My 3 latest games while playing Venom was terminated by app-crash.
All 3 games the score was around 13 billions - after about 10-15 hours of gaming (about 3 days).
Crash happens both live - and while ipad was idle (on ipad 4 with latest ios).
Could be the app itself - but have only experienced while playing Venom.

Bug in Venom:
In the multiball mission it sometimes happens that the mission don't end when u're down to one ball - with various results.