diff --git a/.vscode/ftp-kr.sync.cache.json b/.vscode/ftp-kr.sync.cache.json
index 25c6b7bf..e1d86a0b 100644
--- a/.vscode/ftp-kr.sync.cache.json
+++ b/.vscode/ftp-kr.sync.cache.json
@@ -43,7 +43,119 @@
         "lmtime": 0,
         "modified": false
       },
-      "app": {},
+      "app": {
+        "config": {
+          "addons": {},
+          "config_dev.yml": {
+            "type": "-",
+            "size": 1541,
+            "lmtime": 0,
+            "modified": false
+          },
+          "config_legacy_dev.yml": {
+            "type": "-",
+            "size": 47,
+            "lmtime": 0,
+            "modified": false
+          },
+          "config_legacy_prod.yml": {
+            "type": "-",
+            "size": 163,
+            "lmtime": 0,
+            "modified": false
+          },
+          "config_legacy_test.yml": {
+            "type": "-",
+            "size": 47,
+            "lmtime": 0,
+            "modified": false
+          },
+          "config_legacy.yml": {
+            "type": "-",
+            "size": 590,
+            "lmtime": 0,
+            "modified": false
+          },
+          "config.php": {
+            "type": "-",
+            "size": 4886,
+            "lmtime": 0,
+            "modified": false
+          },
+          "config_prod.yml": {
+            "type": "-",
+            "size": 715,
+            "lmtime": 0,
+            "modified": false
+          },
+          "config_test.yml": {
+            "type": "-",
+            "size": 1001,
+            "lmtime": 0,
+            "modified": false
+          },
+          "config.yml": {
+            "type": "-",
+            "size": 4094,
+            "lmtime": 0,
+            "modified": false
+          },
+          "doctrine.yml": {
+            "type": "-",
+            "size": 880,
+            "lmtime": 0,
+            "modified": false
+          },
+          "parameters.php": {
+            "type": "-",
+            "size": 1019,
+            "lmtime": 1773273531115,
+            "modified": false
+          },
+          "parameters.yml": {
+            "type": "-",
+            "size": 11,
+            "lmtime": 0,
+            "modified": false
+          },
+          "parameters.yml.dist": {
+            "type": "-",
+            "size": 983,
+            "lmtime": 0,
+            "modified": false
+          },
+          "routing_dev.yml": {
+            "type": "-",
+            "size": 1132,
+            "lmtime": 0,
+            "modified": false
+          },
+          "routing.yml": {
+            "type": "-",
+            "size": 315,
+            "lmtime": 0,
+            "modified": false
+          },
+          "security.yml": {
+            "type": "-",
+            "size": 631,
+            "lmtime": 0,
+            "modified": false
+          },
+          "services.yml": {
+            "type": "-",
+            "size": 258,
+            "lmtime": 0,
+            "modified": false
+          },
+          "set_parameters.php": {
+            "type": "-",
+            "size": 3096,
+            "lmtime": 0,
+            "modified": false
+          }
+        }
+      },
       "autoload.php": {
         "type": "-",
         "size": 1316,
@@ -116,13 +228,13 @@
       },
       "google-merchant_id-1.xml": {
         "type": "-",
-        "size": 62638554,
+        "size": 63312722,
         "lmtime": 0,
         "modified": true
       },
       "google-merchant_id-2.xml": {
         "type": "-",
-        "size": 2733981,
+        "size": 2750870,
         "lmtime": 0,
         "modified": true
       },
@@ -318,8 +430,8 @@
           },
           "omnibuseufree.php": {
             "type": "-",
-            "size": 29375,
-            "lmtime": 1772663858543,
+            "size": 29553,
+            "lmtime": 1773275484740,
             "modified": false
           },
           "Readme.md": {
@@ -597,8 +709,8 @@
                 },
                 "presta_studio_omnibus_price.tpl": {
                   "type": "-",
-                  "size": 1401,
-                  "lmtime": 1772663725687,
+                  "size": 1444,
+                  "lmtime": 1773275495347,
                   "modified": false
                 }
               },
@@ -749,7 +861,63 @@
         "lmtime": 0,
         "modified": false
       },
-      "themes": {},
+      "themes": {
+        "leo_lulandia": {
+          "assets": {
+            "css": {
+              "components": {},
+              "dr_materac.css": {
+                "type": "-",
+                "size": 84199,
+                "lmtime": 1773276500555,
+                "modified": false
+              },
+              "dr_materac.css.map": {
+                "type": "-",
+                "size": 32543,
+                "lmtime": 1773276500556,
+                "modified": false
+              },
+              "dr_materac.scss": {
+                "type": "-",
+                "size": 101907,
+                "lmtime": 1773276500559,
+                "modified": false
+              },
+              "index.php": {
+                "type": "-",
+                "size": 1277,
+                "lmtime": 0,
+                "modified": false
+              },
+              "rtl.css": {
+                "type": "-",
+                "size": 61948,
+                "lmtime": 0,
+                "modified": false
+              },
+              "theme.css": {
+                "type": "-",
+                "size": 433723,
+                "lmtime": 0,
+                "modified": false
+              },
+              "theme.css.map": {
+                "type": "-",
+                "size": 1360187,
+                "lmtime": 0,
+                "modified": false
+              },
+              "theme.scss": {
+                "type": "-",
+                "size": 640895,
+                "lmtime": 0,
+                "modified": false
+              }
+            }
+          }
+        }
+      },
       "tools": {},
       "translations": {},
       "upload": {},
@@ -761,6 +929,12 @@
         "size": 448,
         "lmtime": 0,
         "modified": false
+      },
+      "AGENTS.md": {
+        "type": "-",
+        "size": 2807,
+        "lmtime": 1773273811171,
+        "modified": false
       }
     }
   },
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/omnibuseufree/omnibuseufree.php b/modules/omnibuseufree/omnibuseufree.php
index b6673096..b78db343 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}