What the title says. When it reboots, the screen just turns black without any warning or pop up windows. (Though I think I have seen a very dim flash of a red warning strip across the screen one time when using it in the dark.)

I also have a suspicion that the power button might be failing. I generally have to click it harder for it to lock the screen now, and sometimes it opens up the power menu when I only clicked it once.
Would a failing/stuck power button also cause this rebooting behavior?

Thanks!

Edit: Thanks for the help, guys! I think I’ll get my phone checked for a stuck power button some time. Shame I use it often for the camera shortcut.