I didn't have any of that when I was using ArrowOS 11 back in August/September.A lot (or maybe even all) of users have this issue, including me. It's very old bug on Arrow A11. I don't know why our maintainer doesn't know that for so long time. How to pass this information to him, does anyone know? I've tried to do that in Telegram Arrow OS chat, PM him and got fully ignore...The last hope was XDA forum, but seems that messages here are ignoring too. It's very sad...
I also don't have any issues with my display running the current build of ArrowOS 12.
Which firmware are you using and did you clean flash ArrowOS 11?