diff --git a/lib/services/player_service.dart b/lib/services/player_service.dart
index 069e8fa..8068759 100644
--- a/lib/services/player_service.dart
+++ b/lib/services/player_service.dart
@@ -1173,7 +1173,8 @@ class PlayerService {
         final selectedPosition = _atEnd ? _endSeekPosition : null;
         await _openCurrent(
           request,
-          resumePosition: selectedPosition,
+          // Completed chapters restart instead of restoring their end marker.
+          resumePosition: _atEnd ? selectedPosition ?? 0 : null,
           manualReplay: selectedPosition != null,
         );
         return;