It does not close the other screen

[Taifun]

follow @SteveJG's advice

@SteveJG

Instead of switching Screens, consider switching Canvas. See example where Canvas1 is your main screen and Canvas2 is your Germany screen

and your issues with switching screens are gone
from the first screenshot if another edge is reached you are opening screen Germany without closing the current screen...
my guess is in the end this crashes the app, because too many screens are open at the same time without closing the old screens, see also tip 1 here

General Tips and Tricks for App Inventor

This list was made by @Taifun Use different screens wisely Before starting to create another screen, first you should think about is it really necessary? See also Building apps with many screens and SteveJG's post about advantages/disadvantages, because in only one screen you also can use vertical arrangements to simulate different screens, just set the arrangements to visible = true/false as needed... If you decided to use different screens, then you should switch them correctly, else you …

Taifun