Minecraft PE crashes frequently on my iphone

Hi there,
My phone is iPhone SE, it is not listed in the Device list, so I choose the iPhone6 Plus since the CPU of the two devices are the same.

I encounter frequently and unrecoverable MC crash on my iphone. When open the game, i can see the Mojang logo shown and immediately the game exits. Then no matter how many times I open MC, it is the same: game crashes. I tried to reboot my phone, sometimes in new power cycle, MC can open and play, but after some while, exit the game, and reopen it, MC crash again.
I can see lots of MC panic logs in system->privacy->diagnostics, I grab one of them as attachment, please check and fix it, thanks.