External Controller causing background color change

I have bought a Lenovo Tab M10, (Lenovo MODEL TB-X505F) with Android version 10 to get rid of the problem, but this tablet has the same issue. I send you a video of my Samsung Galaxy Tab A7 to show this. It makes no difference what pedal-code I use. It would be nice if you could solve this problem soon.
Kind regards.
edit1: This problem is especially annoying when using my preferred setting of white letters on a black background. See attachments.

Same problem with Galaxy A7 Tab. Hopefully someone has a solution