Super weird UI bugs that could also be security flaws.

fluxcondensator crash logs or application not responding logs may be helpful here. Right now there's very little information, so you'd only get very vague suggestions.

Also, this is the first I'm hearing of this problem, so it may be something to do with your setup. Maybe a misbehaving app. Maybe try checking your battery settings/stats to see if you can figure out if one app is using up too much battery or something.

fluxcondensator Today when i tried to end the session of that secondary user the UI did not respond to that.

Is it possible to say which steps were tried and what happened or didn't?

For example, was the end-session attempt begun by pressing and holding the power button? If so, did the menu not pop up, or did it pop up without "End session" as an option, or ... ...?

A detailed description may be much more actionable than "didn't work".