When the app is minimized, (not fully closed but running in the background.) and then maximized, (brought up again.) The game returns to the loading screen, (usually) freezes after two segments of the "loading bar", and then crashes, turning the screen black. I have to press the power button on my phone several times to recover it, I still don't have it down to an exact science. Once it is recovered, I have to unlock my phone again, and if Minecraft is brought up automatically, I have to minimize it quickly or else it will crash again.  I then have to close Minecraft and open it again. This is quite frustrating as I have to close and re-open Minecraft every time I want to check a command online, or download an addon or world, etc. The cannot take screenshot message is unrelated, I was trying to take a screenshot this time but that never normally pops up.