diff --git a/GameServer/Game/Challenge/ChallengeInstance.cs b/GameServer/Game/Challenge/ChallengeInstance.cs
index cf078fc8..c6a2a77a 100644
--- a/GameServer/Game/Challenge/ChallengeInstance.cs
+++ b/GameServer/Game/Challenge/ChallengeInstance.cs
@@ -296,7 +296,7 @@ public class ChallengeInstance
                 if (monsters == 0) await AdvanceStage(req);
 
                 // Calculate rounds left
-                if (IsStory()) RoundsLeft = (int)Math.Min(Math.Max(RoundsLeft - req.Stt.RoundCnt, 1), RoundsLeft);
+                if (!(IsStory() && IsBoss())) RoundsLeft = (int)Math.Min(Math.Max(RoundsLeft - req.Stt.RoundCnt, 1), RoundsLeft);
 
                 // Set saved technique points (This will be restored if the player resets the challenge)
                 SavedMp = Player.LineupManager!.GetCurLineup()!.Mp;