On two tablets (android 6 and 7) and one phone (android 9) I can only use the top 1/3rd of the screen. On Windows 10 everything works fine.
I used a canvas to add a floor-plan with all my lamps:
I can see all buttons, but only the top 1/3rd of the screen seems active. The rest of the buttons give no reaction.
Any clue what is going wrong?