fix timer handling

KoogleApp/Store/Game/ThrowPanel/Effects.cs

@@ -189,11 +189,9 @@ namespace KoogleApp.Store.Game.ThrowPanel
             await ShowBoardForSeconds(dispatcher);
 
 
-            // save again - save the new state after the throw
+            // save the new state after the throw
             dispatcher.Dispatch(new TriggerNewThrowPanelStateChangedAction(true, 
                 gameSpecificProgress.AfterParticipantsState, gameSpecificProgress.GameModel)); // this will trigger ThrowPanelStateChangedAction with the new state (not current _throwPanelState.Value)
-
-
         }
 
         private async Task ShowBoardForSeconds(IDispatcher dispatcher)

KoogleApp/Store/Game/ThrowTimer/Effects.cs

@@ -32,7 +32,12 @@ namespace KoogleApp.Store.Game.ThrowTimer
             {
                 for (var i = 0; i < action.Seconds; i++)
                 {
-                    await Task.Delay(1000, _timerCancellation.Token);
+                    var token = CancellationToken.None;
+                    if (_timerCancellation != null)
+                    {
+                        token = _timerCancellation.Token;
+                    }
+                    await Task.Delay(1000, token);
                     dispatcher.Dispatch(new TickAction());
                 }
 
@@ -48,12 +53,15 @@ namespace KoogleApp.Store.Game.ThrowTimer
 
         [EffectMethod]
         public async Task HandleStopTimer(StopTimerAction action, IDispatcher dispatcher)
-        {
-            logger.LogInformation("Timer wird gestoppt");
-            await _timerCancellation?.CancelAsync()!;
-            _timerCancellation = null;
+        { 
+            if (_timerCancellation is { IsCancellationRequested: false })
+            {
+                logger.LogInformation("Timer wird gestoppt");
+                await _timerCancellation?.CancelAsync()!;
+                _timerCancellation = null;
 
-            await ReturnToThrowView();
+                await ReturnToThrowView();
+            }
         }
 
         private async Task ReturnToThrowView()