Fallback only to the current time when marking item as watched

MediaBrowser.Controller/Entities/BaseItem.cs

@@ -1863,7 +1863,7 @@ namespace MediaBrowser.Controller.Entities
                 data.PlaybackPositionTicks = 0;
             }
 
-            data.LastPlayedDate = datePlayed ?? data.LastPlayedDate ?? DateTime.UtcNow;
+            data.LastPlayedDate = datePlayed ?? DateTime.UtcNow;
             data.Played = true;
 
             UserDataManager.SaveUserData(user.Id, this, data, UserDataSaveReason.TogglePlayed, CancellationToken.None);