Play mcpe on iPad 2 for 10-15 minutes, then goes to home page

I can play mcpe on my iPad 2 for about 10-15 minutes or a bit longer, and then with no warning what so ever, my iPad 2 goes to the home screen. This problem has plagued me for months and I have mentioned this before on here but the problem I have has not been fixed.

Playing on mcpe on my iPad 2 for up to about 20 minutes then suddenly stops and goes to home screen. It's very annoying. I have been killed several times due to this.