Bought this for my kids - but they barely used it, it wasn't an apple idevice..

So started using it myself & have found it a really useful little tablet, but now having some issues.

Half way through pecking out a post (to Geekzone!) this morning and noticed it had posted - by itself, and the text box was filling with strings of gibberish.
Then suddenly opening apps all over the place, as if I was randomly tapping all over the screen.
Forced it off, restarted and was normal again.

The kids have been using it a lot lately- chromecasting Youtube, when I asked them they said "yeah that thing's really glitchy"
Turns out it's been randomly happening the last couple of weeks.

A quick google didn't show it as a common problem.

Anyone else experiencing this?