but it hasn’t had any software updates in a few years

Switch over as soon as possible, your tablet could be compromised. I would say that if it has not received security updates in years then it almost certainly is. Article.

I know moving files can be annoying, but having a device with a common operating system that is years behind in security updates is cataclysmically insecure. And it would probably fix the flash-banging, either by getting rid of the malware or some other fix.