diff --git a/core/components/minishop3/src/Processors/Gallery/SortByName.php b/core/components/minishop3/src/Processors/Gallery/SortByName.php
new file mode 100644
index 000000000..aeaef46bc
--- /dev/null
+++ b/core/components/minishop3/src/Processors/Gallery/SortByName.php
@@ -0,0 +1,56 @@
+<?php
+
+namespace MiniShop3\Processors\Gallery;
+
+use MiniShop3\MiniShop3;
+use MiniShop3\Model\msProductData;
+use MiniShop3\Model\msProductFile;
+use MiniShop3\Services\Product\ProductImageService;
+use MODX\Revolution\Processors\ModelProcessor;
+
+/**
+ * Re-rank gallery images by natural sort on filename after batch upload (#616).
+ */
+class SortByName extends ModelProcessor
+{
+    public $classKey = msProductFile::class;
+    public $languageTopics = ['minishop3:default', 'minishop3:product'];
+    public $permission = 'msproductfile_save';
+
+    public function process()
+    {
+        $productId = (int) $this->getProperty('product_id');
+
+        if ($productId <= 0) {
+            return $this->failure($this->modx->lexicon('ms3_gallery_err_ns'));
+        }
+
+        /** @var msProductData|null $productData */
+        $productData = $this->modx->getObject(msProductData::class, ['id' => $productId]);
+        if (!$productData) {
+            return $this->failure($this->modx->lexicon('ms3_gallery_err_no_product'));
+        }
+
+        /** @var ProductImageService|null $imageService */
+        $imageService = $this->modx->services->get('ms3_product_image');
+        if (!$imageService instanceof ProductImageService) {
+            return $this->failure($this->modx->lexicon('ms3_err_unknown'));
+        }
+
+        $saved = $imageService->sortProductImagesByName($productData);
+        if ($saved === false) {
+            return $this->failure($this->modx->lexicon('ms3_err_unknown'));
+        }
+
+        $thumb = (string) $productData->get('thumb');
+        if ($thumb === '') {
+            /** @var MiniShop3 $ms3 */
+            $ms3 = $this->modx->services->get('ms3');
+            $thumb = (string) ($ms3->config['defaultThumb'] ?? '');
+        }
+
+        return $this->success('', [
+            'thumb' => $thumb,
+        ]);
+    }
+}
diff --git a/core/components/minishop3/src/Services/Product/ProductImageService.php b/core/components/minishop3/src/Services/Product/ProductImageService.php
index ee89b52a1..7db56657e 100644
--- a/core/components/minishop3/src/Services/Product/ProductImageService.php
+++ b/core/components/minishop3/src/Services/Product/ProductImageService.php
@@ -119,6 +119,77 @@ public function rankProductImages(msProductData $productData, array $ranks): boo
         return true;
     }
 
+    /**
+     * Build natural-sort positions for gallery rows by name (fallback: file), then id.
+     *
+     * @param list<array{id: int, name: string, file: string}> $rows
+     * @return array<int, int> file_id => position (0..n-1)
+     */
+    public static function buildNaturalSortRanks(array $rows): array
+    {
+        if ($rows === []) {
+            return [];
+        }
+
+        usort($rows, static function (array $a, array $b): int {
+            $cmp = strnatcmp(self::naturalSortKey($a), self::naturalSortKey($b));
+            if ($cmp !== 0) {
+                return $cmp;
+            }
+
+            $cmp = strnatcmp(
+                self::foldNaturalSortString((string) ($a['file'] ?? '')),
+                self::foldNaturalSortString((string) ($b['file'] ?? '')),
+            );
+            if ($cmp !== 0) {
+                return $cmp;
+            }
+
+            return (int) ($a['id'] ?? 0) <=> (int) ($b['id'] ?? 0);
+        });
+
+        $ranks = [];
+        foreach ($rows as $position => $row) {
+            $ranks[(int) $row['id']] = $position;
+        }
+
+        return $ranks;
+    }
+
+    /**
+     * Re-rank top-level gallery files by natural sort on name/file (#616).
+     *
+     * Includes all parent_id=0 rows (not only type=image), matching Upload position counting.
+     *
+     * @return bool|mixed save result from updateProductImage(), or true when gallery is empty
+     */
+    public function sortProductImagesByName(msProductData $productData): mixed
+    {
+        $productId = (int) $productData->get('id');
+
+        $rows = [];
+
+        /** @var msProductFile $file */
+        foreach ($this->modx->getIterator(msProductFile::class, [
+            'product_id' => $productId,
+            'parent_id' => 0,
+        ]) as $file) {
+            $rows[] = [
+                'id' => (int) $file->get('id'),
+                'name' => (string) $file->get('name'),
+                'file' => (string) $file->get('file'),
+            ];
+        }
+
+        if ($rows === []) {
+            return true;
+        }
+
+        $this->rankProductImages($productData, self::buildNaturalSortRanks($rows));
+
+        return $this->updateProductImage($productData);
+    }
+
     /**
      * Set which gallery file is the product preview without changing sort order (#130).
      *
@@ -233,6 +304,26 @@ private function getMainGalleryFile(int $productId, ?int $fileId = null): ?msPro
         return $file ?: null;
     }
 
+    /**
+     * @param array{name?: string, file?: string} $row
+     */
+    private static function naturalSortKey(array $row): string
+    {
+        $name = trim((string) ($row['name'] ?? ''));
+        $key = $name !== '' ? $name : (string) ($row['file'] ?? '');
+
+        return self::foldNaturalSortString($key);
+    }
+
+    /**
+     * Case-fold for natural sort. strnatcasecmp is C-locale and skips multibyte
+     * letters (Cyrillic), so UTF-8 names need mb_strtolower first (#616 review).
+     */
+    private static function foldNaturalSortString(string $value): string
+    {
+        return mb_strtolower($value, 'UTF-8');
+    }
+
     /**
      * Remove empty product catalog
      *
diff --git a/core/components/minishop3/tests/Unit/Services/Product/ProductImageServiceSortByNameTest.php b/core/components/minishop3/tests/Unit/Services/Product/ProductImageServiceSortByNameTest.php
new file mode 100644
index 000000000..b41aa3e25
--- /dev/null
+++ b/core/components/minishop3/tests/Unit/Services/Product/ProductImageServiceSortByNameTest.php
@@ -0,0 +1,98 @@
+<?php
+
+declare(strict_types=1);
+
+namespace MiniShop3\Tests\Unit\Services\Product;
+
+use MiniShop3\Services\Product\ProductImageService;
+use PHPUnit\Framework\TestCase;
+
+final class ProductImageServiceSortByNameTest extends TestCase
+{
+    public function testBuildNaturalSortRanksOrdersNumericFilenamesNaturally(): void
+    {
+        $rows = [
+            ['id' => 3, 'name' => '10.jpg', 'file' => '10.jpg'],
+            ['id' => 1, 'name' => '2.jpg', 'file' => '2.jpg'],
+            ['id' => 2, 'name' => '01.jpg', 'file' => '01.jpg'],
+        ];
+
+        $ranks = ProductImageService::buildNaturalSortRanks($rows);
+
+        self::assertSame([2 => 0, 1 => 1, 3 => 2], $ranks);
+    }
+
+    /**
+     * Upload processor stores name without extension (01.jpg → "01").
+     */
+    public function testBuildNaturalSortRanksOrdersExtensionlessUploadNames(): void
+    {
+        $rows = [
+            ['id' => 3, 'name' => '10', 'file' => 'hash10.jpg'],
+            ['id' => 1, 'name' => '2', 'file' => 'hash2.jpg'],
+            ['id' => 2, 'name' => '01', 'file' => 'hash01.jpg'],
+        ];
+
+        $ranks = ProductImageService::buildNaturalSortRanks($rows);
+
+        self::assertSame([2 => 0, 1 => 1, 3 => 2], $ranks);
+    }
+
+    public function testBuildNaturalSortRanksIsCaseInsensitive(): void
+    {
+        $rows = [
+            ['id' => 1, 'name' => 'B.jpg', 'file' => 'b.jpg'],
+            ['id' => 2, 'name' => 'a.jpg', 'file' => 'a.jpg'],
+        ];
+
+        $ranks = ProductImageService::buildNaturalSortRanks($rows);
+
+        self::assertSame([2 => 0, 1 => 1], $ranks);
+    }
+
+    /**
+     * strnatcasecmp alone does not case-fold Cyrillic under locale C (#616 review).
+     */
+    public function testBuildNaturalSortRanksIsCaseInsensitiveForCyrillic(): void
+    {
+        $rows = [
+            ['id' => 1, 'name' => 'Фото 1.jpg', 'file' => 'f1.jpg'],
+            ['id' => 4, 'name' => 'Фото 10.jpg', 'file' => 'f10.jpg'],
+            ['id' => 2, 'name' => 'фото 2.jpg', 'file' => 'f2.jpg'],
+            ['id' => 3, 'name' => 'фото 3.jpg', 'file' => 'f3.jpg'],
+        ];
+
+        $ranks = ProductImageService::buildNaturalSortRanks($rows);
+
+        self::assertSame([1 => 0, 2 => 1, 3 => 2, 4 => 3], $ranks);
+    }
+
+    public function testBuildNaturalSortRanksFallsBackToFileWhenNameEmpty(): void
+    {
+        $rows = [
+            ['id' => 1, 'name' => '', 'file' => 'z.jpg'],
+            ['id' => 2, 'name' => '', 'file' => 'a.jpg'],
+        ];
+
+        $ranks = ProductImageService::buildNaturalSortRanks($rows);
+
+        self::assertSame([2 => 0, 1 => 1], $ranks);
+    }
+
+    public function testBuildNaturalSortRanksTieBreaksById(): void
+    {
+        $rows = [
+            ['id' => 5, 'name' => 'same.jpg', 'file' => 'same.jpg'],
+            ['id' => 2, 'name' => 'same.jpg', 'file' => 'same.jpg'],
+        ];
+
+        $ranks = ProductImageService::buildNaturalSortRanks($rows);
+
+        self::assertSame([2 => 0, 5 => 1], $ranks);
+    }
+
+    public function testBuildNaturalSortRanksReturnsEmptyForEmptyInput(): void
+    {
+        self::assertSame([], ProductImageService::buildNaturalSortRanks([]));
+    }
+}
diff --git a/vueManager/src/components/gallery/ProductGallery.vue b/vueManager/src/components/gallery/ProductGallery.vue
index 3ea3e67f3..d09baeaec 100644
--- a/vueManager/src/components/gallery/ProductGallery.vue
+++ b/vueManager/src/components/gallery/ProductGallery.vue
@@ -37,6 +37,7 @@ const {
   isLoading,
   fetchGalleryList,
   sortFiles,
+  sortFilesByName,
   deleteFiles,
   deleteAll,
   regenerateThumbs,
@@ -346,10 +347,40 @@ function onChangeSource(sourceId) {
 }
 
 /**
- * Handle upload events
+ * Serialize overlapping Uppy `complete` handlers (allowMultipleUploadBatches)
+ * so SortByName does not race on the same product in one tab (#616).
  */
-function onUploadComplete() {
-  loadImages()
+let uploadCompleteQueue = Promise.resolve()
+
+/**
+ * After batch upload: natural-sort positions by filename (#616), then reload grid.
+ */
+function onUploadComplete(result) {
+  uploadCompleteQueue = uploadCompleteQueue
+    .then(() => runUploadComplete(result))
+    .catch(() => {})
+}
+
+async function runUploadComplete(result) {
+  const hasUploads = (result?.successful?.length ?? 0) > 0
+
+  try {
+    if (hasUploads) {
+      const { thumb } = await sortFilesByName(props.productId)
+      if (thumb) {
+        updateProductThumb(thumb)
+      }
+    }
+  } catch (error) {
+    toast.add({
+      severity: 'error',
+      summary: _('ms3_gallery_errors'),
+      detail: error.message,
+      life: 5000,
+    })
+  } finally {
+    await loadImages()
+  }
 }
 
 onMounted(() => {
diff --git a/vueManager/src/composables/useGalleryApi.js b/vueManager/src/composables/useGalleryApi.js
index ba4805967..cbf0fcc93 100644
--- a/vueManager/src/composables/useGalleryApi.js
+++ b/vueManager/src/composables/useGalleryApi.js
@@ -131,6 +131,18 @@ export function useGalleryApi() {
     return { thumb: data.object?.thumb || '' }
   }
 
+  /**
+   * Sort gallery files by natural filename order (#616).
+   * @param {number} productId
+   * @returns {Promise<{thumb: string}>}
+   */
+  async function sortFilesByName(productId) {
+    const data = await connectorRequest('MiniShop3\\Processors\\Gallery\\SortByName', {
+      product_id: productId,
+    })
+    return { thumb: data.object?.thumb || '' }
+  }
+
   /**
    * Delete files by IDs
    * @param {number[]} ids
@@ -226,6 +238,7 @@ export function useGalleryApi() {
     isLoading,
     fetchGalleryList,
     sortFiles,
+    sortFilesByName,
     deleteFiles,
     deleteAll,
     regenerateThumbs,