Jailbroken device shooting Bow crash

I was shooting a bow on my Jailbroken iPad, on a survival world and it crashes my app. NOTE: THE APP IS NOT DECRYPTED! It crashes 100% of the time. Does not work in Creative. Not sure it works in SMP. What I mean by crash is that it freezes my app for a while and goes back to the home screen.

Materials:
1 Jailbroken iPad 1G.
Non-decrypted MCPE
1 Bow
At least 1 arrow.