diff --git a/app/Services/Search/Drivers/ManticoreSearchDriver.php b/app/Services/Search/Drivers/ManticoreSearchDriver.php
index 6455466d8..e33bc5240 100644
--- a/app/Services/Search/Drivers/ManticoreSearchDriver.php
+++ b/app/Services/Search/Drivers/ManticoreSearchDriver.php
@@ -366,7 +366,7 @@ class ManticoreSearchDriver implements SearchDriverInterface
 
             $documents[] = array_merge(
                 ['id' => $release['id']],
-                ReleaseSearchIndexDocument::normalize($release)
+                ReleaseSearchIndexDocument::normalizeForBulk($release)
             );
         }
 
diff --git a/app/Support/ReleaseSearchIndexDocument.php b/app/Support/ReleaseSearchIndexDocument.php
index 81008630f..f36dd7e45 100644
--- a/app/Support/ReleaseSearchIndexDocument.php
+++ b/app/Support/ReleaseSearchIndexDocument.php
@@ -9,6 +9,26 @@ namespace App\Support;
  */
 final class ReleaseSearchIndexDocument
 {
+    /**
+     * Normalize a release row for bulk indexing. Rows already produced by {@see normalize()}
+     * (e.g. from release search populate) lack `postdate` / `adddate` keys;
+     * calling {@see normalize()} again would zero `postdate_ts` / `adddate_ts` unless those sources are restored.
+     *
+     * @param  array<string, mixed>  $row
+     * @return array<string, mixed>
+     */
+    public static function normalizeForBulk(array $row): array
+    {
+        if (array_key_exists('postdate_ts', $row) && ! array_key_exists('postdate', $row)) {
+            $row = array_merge($row, [
+                'postdate' => $row['postdate_ts'] ?? null,
+                'adddate' => $row['adddate_ts'] ?? null,
+            ]);
+        }
+
+        return self::normalize($row);
+    }
+
     /**
      * @param  array<string, mixed>  $row  Keys from DB or insert parameters
      * @return array<string, mixed>
diff --git a/tests/Unit/ReleaseSearchIndexDocumentTest.php b/tests/Unit/ReleaseSearchIndexDocumentTest.php
new file mode 100644
index 000000000..dc179fb64
--- /dev/null
+++ b/tests/Unit/ReleaseSearchIndexDocumentTest.php
@@ -0,0 +1,49 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Tests\Unit;
+
+use App\Support\ReleaseSearchIndexDocument;
+use PHPUnit\Framework\Attributes\Test;
+use PHPUnit\Framework\TestCase;
+
+final class ReleaseSearchIndexDocumentTest extends TestCase
+{
+    #[Test]
+    public function normalize_for_bulk_preserves_timestamps_when_row_is_already_normalized(): void
+    {
+        $first = ReleaseSearchIndexDocument::normalize([
+            'id' => 42,
+            'name' => 'n',
+            'searchname' => 's',
+            'fromname' => 'f',
+            'categories_id' => 1,
+            'filename' => '',
+            'imdbid' => '',
+            'tmdbid' => 0,
+            'traktid' => 0,
+            'tvdb' => 0,
+            'tvmaze' => 0,
+            'tvrage' => 0,
+            'videos_id' => 0,
+            'movieinfo_id' => 0,
+            'size' => 100,
+            'postdate' => '2025-01-15 12:00:00',
+            'adddate' => '2025-01-16 08:30:00',
+            'totalpart' => 0,
+            'grabs' => 0,
+            'passwordstatus' => -1,
+            'groups_id' => 1,
+            'nzbstatus' => 1,
+            'haspreview' => 0,
+        ]);
+
+        $second = ReleaseSearchIndexDocument::normalizeForBulk($first);
+
+        self::assertSame($first['postdate_ts'], $second['postdate_ts']);
+        self::assertSame($first['adddate_ts'], $second['adddate_ts']);
+        self::assertGreaterThan(0, $second['postdate_ts']);
+        self::assertGreaterThan(0, $second['adddate_ts']);
+    }
+}