diff --git a/Jugenddienst Stunden/Views/StundenPage.xaml.cs b/Jugenddienst Stunden/Views/StundenPage.xaml.cs
index 4a25a47..a969ef0 100644
--- a/Jugenddienst Stunden/Views/StundenPage.xaml.cs	
+++ b/Jugenddienst Stunden/Views/StundenPage.xaml.cs	
@@ -28,24 +28,28 @@ public partial class StundenPage : ContentPage {
         //var desiredHeight = screenHeight - 450; // Abzüglich der Stundenübersicht
         //stundeItems.HeightRequest = desiredHeight;
 
-        #if ANDROID
+#if ANDROID
+        heightValue = 280;
+#elif IOS
                 heightValue = 280;
-        #elif IOS
-                heightValue = 280;
-        #elif WINDOWS
+#elif WINDOWS
                 heightValue = 320;
-        #else
+#else
                 heightValue = 300;
-        #endif
+#endif
 
         SizeChanged += OnPageSizeChanged;
     }
 
     private void Vm_AlertEvent(object? sender, string e) {
-        DisplayAlert("Fehler:", e, "OK");
+        MainThread.BeginInvokeOnMainThread(async () => {
+            await DisplayAlert("Fehler:", e, "OK");
+        });
     }
     private void Vm_InfoEvent(object? sender, string e) {
-        DisplayAlert("Information:", e, "OK");
+        MainThread.BeginInvokeOnMainThread(async () => {
+            await DisplayAlert("Information:", e, "OK");
+        });
     }
 
     /// <summary>