diff --git a/.vscode/ftp-kr.sync.cache.json b/.vscode/ftp-kr.sync.cache.json
index e3a47524..b4edcd3b 100644
--- a/.vscode/ftp-kr.sync.cache.json
+++ b/.vscode/ftp-kr.sync.cache.json
@@ -310,8 +310,8 @@
           },
           "omnibuseufree.php": {
             "type": "-",
-            "size": 29422,
-            "lmtime": 1772664207383,
+            "size": 29536,
+            "lmtime": 1773275664802,
             "modified": false
           },
           "Readme.md": {
@@ -589,8 +589,8 @@
                 },
                 "presta_studio_omnibus_price.tpl": {
                   "type": "-",
-                  "size": 1401,
-                  "lmtime": 1772664072085,
+                  "size": 1444,
+                  "lmtime": 1773275797861,
                   "modified": false
                 }
               },
@@ -699,13 +699,314 @@
         "modified": false
       },
       "src": {},
-      "themes": {},
+      "themes": {
+        "classic": {
+          "assets": {
+            "css": {
+              "00b1fb69fb78ff50fd555de80b2fb45e.ttf": {
+                "type": "-",
+                "size": 174048,
+                "lmtime": 0,
+                "modified": false
+              },
+              "016d41b1da3f1f5aaa44a7e20baee117.woff": {
+                "type": "-",
+                "size": 32904,
+                "lmtime": 0,
+                "modified": false
+              },
+              "04be689c12d686c595032705f6b3cf6c.svg": {
+                "type": "-",
+                "size": 848,
+                "lmtime": 0,
+                "modified": false
+              },
+              "057cc3c927dc0b2e8dbb739a306bd3a3.otf": {
+                "type": "-",
+                "size": 73016,
+                "lmtime": 0,
+                "modified": false
+              },
+              "0ba57b3ea460c3d7d0c46d6138f088a8.svg": {
+                "type": "-",
+                "size": 3780,
+                "lmtime": 0,
+                "modified": false
+              },
+              "0f099f4e4d67aeb18ab6da291367a93f.woff": {
+                "type": "-",
+                "size": 32596,
+                "lmtime": 0,
+                "modified": false
+              },
+              "12a47ed5fd5585f0f4227fa035a1a607.woff2": {
+                "type": "-",
+                "size": 60840,
+                "lmtime": 0,
+                "modified": false
+              },
+              "1e81f33d197ccdb39d4edce581ff50ec.woff": {
+                "type": "-",
+                "size": 30148,
+                "lmtime": 0,
+                "modified": false
+              },
+              "250c120c3f8b2b0bb58ea27ee36153fc.woff2": {
+                "type": "-",
+                "size": 29860,
+                "lmtime": 0,
+                "modified": false
+              },
+              "29acb3c63123183305b02ebc9844b2ef.otf": {
+                "type": "-",
+                "size": 73124,
+                "lmtime": 0,
+                "modified": false
+              },
+              "33e7446832ac7aa84b959a6ea8efb915.svg": {
+                "type": "-",
+                "size": 891,
+                "lmtime": 0,
+                "modified": false
+              },
+              "38fa559ad8e8cbaee0c7a2178d308df5.woff2": {
+                "type": "-",
+                "size": 27760,
+                "lmtime": 0,
+                "modified": false
+              },
+              "3a94078d659136527abfe39bc3432628.svg": {
+                "type": "-",
+                "size": 1013,
+                "lmtime": 0,
+                "modified": false
+              },
+              "40ef5dc59db6eeef16942fc6a0baa8de.otf": {
+                "type": "-",
+                "size": 71000,
+                "lmtime": 0,
+                "modified": false
+              },
+              "479700ea91d964d295d75c6b67bd0b28.eot": {
+                "type": "-",
+                "size": 69177,
+                "lmtime": 0,
+                "modified": false
+              },
+              "47f13bcaf75af86613bca9721d6e858f.svg": {
+                "type": "-",
+                "size": 901,
+                "lmtime": 0,
+                "modified": false
+              },
+              "4903fb37c04676f5a805be194ad59b2b.svg": {
+                "type": "-",
+                "size": 1560,
+                "lmtime": 0,
+                "modified": false
+              },
+              "4db1ea0d15010c761ee577d7c0f5a0a0.otf": {
+                "type": "-",
+                "size": 70960,
+                "lmtime": 0,
+                "modified": false
+              },
+              "52260854eea2d38939bf40e9e9687830.woff2": {
+                "type": "-",
+                "size": 29756,
+                "lmtime": 0,
+                "modified": false
+              },
+              "56b65c6bec8f40445da4f7853f2553ec.otf": {
+                "type": "-",
+                "size": 70940,
+                "lmtime": 0,
+                "modified": false
+              },
+              "57a1d494b0e76131f062c5c9c2d4960d.woff2": {
+                "type": "-",
+                "size": 30220,
+                "lmtime": 0,
+                "modified": false
+              },
+              "64041bf784575b30a79fa31900c79cf6.otf": {
+                "type": "-",
+                "size": 70404,
+                "lmtime": 0,
+                "modified": false
+              },
+              "726b87682d18d1e8307635d146fe58cc.svg": {
+                "type": "-",
+                "size": 3103,
+                "lmtime": 0,
+                "modified": false
+              },
+              "740f1557cae714dc4b180b4d5de69375.svg": {
+                "type": "-",
+                "size": 5233,
+                "lmtime": 0,
+                "modified": false
+              },
+              "7acb0ff3a9a16ba3806d7f16b745af38.svg": {
+                "type": "-",
+                "size": 1192,
+                "lmtime": 0,
+                "modified": false
+              },
+              "83131b9daba3e9a7b2c7ae7e47d2d503.woff": {
+                "type": "-",
+                "size": 31392,
+                "lmtime": 0,
+                "modified": false
+              },
+              "882e1291e47c7d9d5dd7633845caa204.svg": {
+                "type": "-",
+                "size": 891,
+                "lmtime": 0,
+                "modified": false
+              },
+              "895e092292d88717adaa347e532822ab.woff2": {
+                "type": "-",
+                "size": 28776,
+                "lmtime": 0,
+                "modified": false
+              },
+              "91fc2885f1aa34fb73f63e9ef538fe1c.svg": {
+                "type": "-",
+                "size": 1145,
+                "lmtime": 0,
+                "modified": false
+              },
+              "a7360927bb3673ed7814d6f607d122cb.woff2": {
+                "type": "-",
+                "size": 29856,
+                "lmtime": 0,
+                "modified": false
+              },
+              "a8af1233a958bd1e96edcad65791a0d3.woff": {
+                "type": "-",
+                "size": 32840,
+                "lmtime": 0,
+                "modified": false
+              },
+              "b252849e892c264f4f220c7e7cb0207a.svg": {
+                "type": "-",
+                "size": 1198,
+                "lmtime": 0,
+                "modified": false
+              },
+              "b2efa71e4ca1cd26b0f4df4e71e531a8.svg": {
+                "type": "-",
+                "size": 357,
+                "lmtime": 0,
+                "modified": false
+              },
+              "c472ea2ef3e5b37438730a4ab00513b4.svg": {
+                "type": "-",
+                "size": 901,
+                "lmtime": 0,
+                "modified": false
+              },
+              "c80d4fb11dcc2140b26007ce39cfa521.woff": {
+                "type": "-",
+                "size": 32508,
+                "lmtime": 0,
+                "modified": false
+              },
+              "cbeba06698c00a61e82219b76357ce42.svg": {
+                "type": "-",
+                "size": 1020,
+                "lmtime": 0,
+                "modified": false
+              },
+              "custom.css": {
+                "type": "-",
+                "size": 97853,
+                "lmtime": 1773275854119,
+                "modified": false
+              },
+              "custom.css.map": {
+                "type": "-",
+                "size": 235820,
+                "lmtime": 1773275854119,
+                "modified": false
+              },
+              "custom.scss": {
+                "type": "-",
+                "size": 103002,
+                "lmtime": 1773275853024,
+                "modified": false
+              },
+              "dce0916af972e3040aa191f74b17dd46.woff2": {
+                "type": "-",
+                "size": 30428,
+                "lmtime": 0,
+                "modified": false
+              },
+              "de69cd9e672c81725abcde04ecf022ee.woff": {
+                "type": "-",
+                "size": 33400,
+                "lmtime": 0,
+                "modified": false
+              },
+              "error.css": {
+                "type": "-",
+                "size": 742,
+                "lmtime": 0,
+                "modified": false
+              },
+              "f2a0933406f7830651524f477ba2f543.woff": {
+                "type": "-",
+                "size": 79612,
+                "lmtime": 0,
+                "modified": false
+              },
+              "f56d95737d55e2bdba95baa528b2583b.svg": {
+                "type": "-",
+                "size": 3780,
+                "lmtime": 0,
+                "modified": false
+              },
+              "fa3993a997a0b84e9900ee168b18b919.svg": {
+                "type": "-",
+                "size": 848,
+                "lmtime": 0,
+                "modified": false
+              },
+              "fd2d932b381003546821288ecde6e370.otf": {
+                "type": "-",
+                "size": 71180,
+                "lmtime": 0,
+                "modified": false
+              },
+              "theme.css": {
+                "type": "-",
+                "size": 192439,
+                "lmtime": 0,
+                "modified": false
+              },
+              "theme.css.map": {
+                "type": "-",
+                "size": 544940,
+                "lmtime": 0,
+                "modified": false
+              },
+              "theme.scss": {
+                "type": "-",
+                "size": 255419,
+                "lmtime": 0,
+                "modified": false
+              }
+            }
+          }
+        }
+      },
       "tmp": {},
       "tools": {},
       "translations": {},
       "update_price_log.csv": {
         "type": "-",
-        "size": 1233708,
+        "size": 1251796,
         "lmtime": 0,
         "modified": true
       },
diff --git a/changelog/2026-03-16.md b/changelog/2026-03-16.md
new file mode 100644
index 00000000..1c629e8f
--- /dev/null
+++ b/changelog/2026-03-16.md
@@ -0,0 +1,12 @@
+# 2026-03-16
+
+## Co zrobiono
+- Naprawiono wyświetlanie ceny w fallbacku modułu `omnibuseufree` i dopasowano zaokrąglanie do sposobu prezentacji cen na froncie.
+- Dodano tryb debug uruchamiany parametrem `omnibuseufree_debug=1`, aby podejrzeć wartości wejściowe i wyliczone (`price`, `price_amount`, `regular_price`, fallback, minimalna).
+- Uporządkowano logikę braku historii: gdy brak historii do wyświetlenia, moduł pokazuje cenę regularną (bez promocji).
+- Dodano warunek dla promocji: jeśli w historii z okresu nie ma ceny różnej od bieżącej ceny promocyjnej, moduł traktuje to jako brak historii „sprzed obniżki” i wymusza fallback na cenę regularną.
+- Zweryfikowano na przypadkach testowych poprawne wyjście (w tym przypadki z wcześniejszym błędem 4 067,52 / 4 068,00 oraz z historią zawierającą tylko aktualną cenę promocyjną).
+
+## Zmienione pliki
+- `modules/omnibuseufree/omnibuseufree.php`
+- `modules/omnibuseufree/views/templates/hook/presta_studio_omnibus_price.tpl`
diff --git a/modules/gm_omniprice/.DS_Store b/modules/gm_omniprice/.DS_Store
deleted file mode 100644
index f85fc7e6..00000000
Binary files a/modules/gm_omniprice/.DS_Store and /dev/null differ
diff --git a/modules/omnibuseufree/omnibuseufree.php b/modules/omnibuseufree/omnibuseufree.php
index 346c0163..0ddd71a7 100644
--- a/modules/omnibuseufree/omnibuseufree.php
+++ b/modules/omnibuseufree/omnibuseufree.php
@@ -148,14 +148,95 @@ class OmnibusEuFree extends Module
         return (!empty($sqlResult)) ? $sqlResult[0] : array();
     }
 
+    protected function hasDifferentHistoricalPrice($id_product, $id_product_attribute, $currency, $currentPrice)
+    {
+        $info_version = Configuration::get('OMNIBUSEUFREE_INFORMATION_VERSION', null, null, null, 2);
+        $numberOfDays = (int) Configuration::get('OMNIBUSEUFREE_DAYS', null, null, null, 30);
+
+        $date = new DateTime();
+        $date->modify('-' . $numberOfDays . ' days');
+        $cutOffDate = $date->format('Y-m-d');
+
+        $sql = new DbQuery();
+        $sql->select('id_omnibuseufree');
+        $sql->from('omnibus_eu_free');
+        $sql->where('id_product = ' . (int) $id_product);
+        $sql->where('id_product_attribute = ' . (int) $id_product_attribute);
+        $sql->where('id_currency = ' . (int) $currency);
+        $sql->where('date_add >= "' . pSQL($cutOffDate . ' 00:00:00') . '"');
+        $sql->where('ABS(price - ' . (float) $currentPrice . ') > 0.000001');
+
+        if ($info_version == 2) {
+            $sql->where('is_last = 0');
+        }
+
+        $sql->limit(1);
+
+        return (bool) Db::getInstance()->getValue($sql);
+    }
+
+    protected function formatDisplayPrice($price, $currency, $precisionOverride = null)
+    {
+        if ($precisionOverride !== null) {
+            $priceDisplayPrecision = (int) $precisionOverride;
+        } else {
+            $priceDisplayPrecision = (int) Configuration::get('PS_PRICE_DISPLAY_PRECISION', null, null, null, _PS_PRICE_DISPLAY_PRECISION_);
+        }
+        $roundedPrice = Tools::ps_round((float) $price, $priceDisplayPrecision);
+
+        return PrestashopCompatibility::formatPrice(_PS_VERSION_, $roundedPrice, $currency);
+    }
+
     public function hookDisplayOmnibusEuFree($params)
     {
         $currency = $this->context->currency;
-        $lastMinimalPrice = $this->getLastMinimalPrice($params['product']['id_product'], $params['product']['id_product_attribute'], $currency->id);
+        $debugEnabled = (bool) Tools::getValue('omnibuseufree_debug');
+        $idProduct = isset($params['product']['id_product']) ? (int) $params['product']['id_product'] : 0;
+        $idProductAttribute = isset($params['product']['id_product_attribute']) ? (int) $params['product']['id_product_attribute'] : 0;
+        $lastMinimalPrice = $this->getLastMinimalPrice($idProduct, $idProductAttribute, $currency->id);
         $regularPrice = isset($params['product']['regular_price']) ? $params['product']['regular_price'] : null;
+        $displayPrecisionOverride = null;
+        $forcedFallbackNoPreDiscountHistory = false;
+
+        if (isset($params['product']['price_amount']) && is_numeric($params['product']['price_amount'])) {
+            $priceAmount = (float) $params['product']['price_amount'];
+            if (abs($priceAmount - round($priceAmount)) < 0.000001) {
+                $displayPrecisionOverride = 0;
+            }
+        }
+
+        $fallbackPrice = null;
+        if (is_string($regularPrice) && $regularPrice !== '') {
+            // Prefer the already prepared regular (non-discounted) price from product presenter.
+            $fallbackPrice = $regularPrice;
+        } elseif ($idProduct > 0) {
+            // Compute regular (without reduction) price if presenter did not provide it.
+            $useTax = Product::getTaxCalculationMethod((int) $this->context->customer->id) != PS_TAX_EXC;
+            $regularRaw = Product::getPriceStatic($idProduct, $useTax, $idProductAttribute, 6, null, false, false);
+            $fallbackPrice = $this->formatDisplayPrice((float) $regularRaw, $currency, $displayPrecisionOverride);
+        } elseif (isset($params['product']['price_amount']) && is_numeric($params['product']['price_amount'])) {
+            // Last resort if product id is missing in hook params.
+            $fallbackPrice = $this->formatDisplayPrice((float) $params['product']['price_amount'], $currency, $displayPrecisionOverride);
+        } elseif (isset($params['product']['price']) && is_numeric($params['product']['price'])) {
+            $fallbackPrice = $this->formatDisplayPrice((float) $params['product']['price'], $currency, $displayPrecisionOverride);
+        } elseif (isset($params['product']['price']) && is_string($params['product']['price']) && $params['product']['price'] !== '') {
+            $fallbackPrice = $params['product']['price'];
+        }
 
         if (!empty($lastMinimalPrice)) {
-            $minimalPrice = PrestashopCompatibility::formatPrice(_PS_VERSION_, $lastMinimalPrice['price'], $currency);
+            if (
+                !empty($params['product']['has_discount']) &&
+                isset($params['product']['price_amount']) &&
+                is_numeric($params['product']['price_amount']) &&
+                !$this->hasDifferentHistoricalPrice($idProduct, $idProductAttribute, $currency->id, (float) $params['product']['price_amount'])
+            ) {
+                $lastMinimalPrice = array();
+                $forcedFallbackNoPreDiscountHistory = true;
+            }
+        }
+
+        if (!empty($lastMinimalPrice)) {
+            $minimalPrice = $this->formatDisplayPrice($lastMinimalPrice['price'], $currency, $displayPrecisionOverride);
         }
         else {
             $minimalPrice = null;
@@ -166,8 +247,26 @@ class OmnibusEuFree extends Module
             'OmnibuseufreeProductPriceMin' => $minimalPrice,
             'OmnibuseufreeProductPriceCurrent' => $params['product']['price'],
             'OmnibuseufreeProductPriceRegular' => $regularPrice,
+            'OmnibuseufreeProductPriceFallback' => $fallbackPrice,
             'OmnibuseufreeProductDiscount' => (bool) $params['product']['has_discount'],
             'OmnibuseufreeNumberOfDays' => (int) Configuration::get('OMNIBUSEUFREE_DAYS', null, null, null, 30),
+            'OmnibuseufreeDebugEnabled' => $debugEnabled,
+            'OmnibuseufreeDebugData' => [
+                'marker' => 'omnibuseufree-debug-2026-03-16',
+                'product_id' => $idProduct,
+                'product_attribute_id' => $idProductAttribute,
+                'currency_id' => isset($currency->id) ? (int) $currency->id : null,
+                'currency_iso' => isset($currency->iso_code) ? (string) $currency->iso_code : '',
+                'price_display_precision' => (int) Configuration::get('PS_PRICE_DISPLAY_PRECISION', null, null, null, _PS_PRICE_DISPLAY_PRECISION_),
+                'display_precision_override' => $displayPrecisionOverride === null ? 'null' : (string) $displayPrecisionOverride,
+                'param_price' => isset($params['product']['price']) ? (string) $params['product']['price'] : null,
+                'param_price_amount' => isset($params['product']['price_amount']) ? (string) $params['product']['price_amount'] : null,
+                'param_regular_price' => isset($params['product']['regular_price']) ? (string) $params['product']['regular_price'] : null,
+                'computed_fallback' => (string) $fallbackPrice,
+                'computed_minimal' => (string) $minimalPrice,
+                'has_discount' => !empty($params['product']['has_discount']) ? '1' : '0',
+                'forced_fallback_no_pre_discount_history' => $forcedFallbackNoPreDiscountHistory ? '1' : '0',
+            ],
         ]);
 
         return $this->display(__FILE__, '/views/templates/hook/presta_studio_omnibus_price.tpl');
@@ -194,7 +293,7 @@ class OmnibusEuFree extends Module
             foreach ($rowValue as $key => $value) {
                 if (isset($OmnibusData[$rowId]['price']) && $key == 'id_currency') {
                     $currency = Currency::getCurrencyInstance((int) $value);
-                    $OmnibusData[$rowId]['price_locale'] = PrestashopCompatibility::formatPrice(_PS_VERSION_, $OmnibusData[$rowId]['price'], $currency);
+                    $OmnibusData[$rowId]['price_locale'] = $this->formatDisplayPrice($OmnibusData[$rowId]['price'], $currency);
                     $OmnibusData[$rowId]['currency_iso_code'] = $currency->iso_code;
                 }
                 elseif ($key == 'id_product_attribute') {
diff --git a/modules/omnibuseufree/views/templates/hook/presta_studio_omnibus_price.tpl b/modules/omnibuseufree/views/templates/hook/presta_studio_omnibus_price.tpl
index 16192490..660c98d1 100644
--- a/modules/omnibuseufree/views/templates/hook/presta_studio_omnibus_price.tpl
+++ b/modules/omnibuseufree/views/templates/hook/presta_studio_omnibus_price.tpl
@@ -21,7 +21,7 @@
                 {l s='Lowest price in %d days before discount: ' sprintf=[$OmnibuseufreeNumberOfDays] mod='omnibuseufree'}<span class="presta-studio-price-history-price">{$OmnibuseufreeProductPriceMin}</span>
             {else}
                 {* when history is empty *}
-                {l s='Lowest price in %d days: ' sprintf=[$OmnibuseufreeNumberOfDays] mod='omnibuseufree'}<span class="presta-studio-price-history-price">{$OmnibuseufreeProductPriceRegular|default:$OmnibuseufreeProductPriceCurrent}</span>
+                {l s='Lowest price in %d days: ' sprintf=[$OmnibuseufreeNumberOfDays] mod='omnibuseufree'}<span class="presta-studio-price-history-price">{$OmnibuseufreeProductPriceFallback|default:$OmnibuseufreeProductPriceCurrent}</span>
             {/if}
         {else}
             {l s='Lowest price in %d days: ' sprintf=[$OmnibuseufreeNumberOfDays] mod='omnibuseufree'}<span class="presta-studio-price-history-price">{$OmnibuseufreeProductPriceMin}</span>
@@ -29,3 +29,22 @@
         </p>
     </div>
 {/if}
+
+{if isset($OmnibuseufreeDebugEnabled) && $OmnibuseufreeDebugEnabled && isset($OmnibuseufreeDebugData)}
+    <div class="presta-studio-price-history" style="margin-top:6px;">
+        <p class="presta-studio-price-history-text" style="font-size:12px; line-height:1.35;">
+            <strong>OMNIBUS DEBUG</strong><br>
+            marker: {$OmnibuseufreeDebugData.marker}<br>
+            product_id: {$OmnibuseufreeDebugData.product_id}, attr_id: {$OmnibuseufreeDebugData.product_attribute_id}<br>
+            currency: {$OmnibuseufreeDebugData.currency_iso} ({$OmnibuseufreeDebugData.currency_id}), precision: {$OmnibuseufreeDebugData.price_display_precision}<br>
+            precision_override: {$OmnibuseufreeDebugData.display_precision_override}<br>
+            has_discount: {$OmnibuseufreeDebugData.has_discount}<br>
+            param price: {$OmnibuseufreeDebugData.param_price}<br>
+            param price_amount: {$OmnibuseufreeDebugData.param_price_amount}<br>
+            param regular_price: {$OmnibuseufreeDebugData.param_regular_price}<br>
+            computed fallback: {$OmnibuseufreeDebugData.computed_fallback}<br>
+            computed minimal: {$OmnibuseufreeDebugData.computed_minimal}<br>
+            forced_fallback_no_pre_discount_history: {$OmnibuseufreeDebugData.forced_fallback_no_pre_discount_history}
+        </p>
+    </div>
+{/if}