On screen write problem

I’d like to ask for help with the next problem.
When I write or draw on the screen, after a while (1-2 minutes) it starts to flash, and blacks out. Sometimes I have to restart the device completely. If I do not restart it, it will stay black and I can’t use it. It started with the Excel, after a while the Inkodo did the same. I could use the notes for a longer period of time but it does the same now. It flashes after a few minutes if i write.

Video for problem