Ah so whenever a notification pops up on your device, the device gives you the "Top Eleven has stopped working" error. And this goes for both of you.

Um... now that I think about it, I might be having the same issue lol.
I've been getting the "Top Eleven has stopped working" error for a while now but thought it was because of one of messenger's built-in games. I came to that conclusion since quite a few things give me the "has stopped" error, even messenger, so I thought the problem was with my device or something.

I'll update my report on this issue.

P.S.
Just to confirm - You two are getting the "has stopped" error while playing Top Eleven and a push notification pops up, or just happens while you're outside of the game (minimized it via the Home button on Android)? Sorry if I'm repeating myself, just want to nail down all the details.

EDIT:
Also - Can you guys tell me how much free space there is on your device?