Fix End Round Crashes

mod/Jailbreak.SpecialDay/SpecialDays/RocketJumpDay.cs

@@ -115,7 +115,10 @@ public class RocketJumpDay(BasePlugin plugin, IServiceProvider provider)
     Plugin.DeregisterEventHandler<EventWeaponFire>(onWeaponFire);
     Plugin.DeregisterEventHandler<EventPlayerHurt>(onHurt, HookMode.Pre);
     Plugin.RemoveListener<Listeners.OnTick>(onTick);
-    jumping.Clear();
+
+    // Delay to avoid mutation during hook execution
+    Server.NextFrameAsync(() => { jumping.Clear(); });
+    
     return base.OnEnd(ev, info);
   }