Plz fix this. Crashes every time this happen.

When I power the piston/s or a sticky piston/s to push the filled cauldron/s with potions or water to the comparator (output), and then turning the power off, (input), my game crashes everytime I turn off the power of the piston/s connecting to the output It even happen when you push the filled cauldron/s alone with piston/s or sticky piston/s. My device is Ipad Mini 2. Fix this plz.