Game Crash [Blaze's Suffocating]

The game Crash when the blazes are drowning into a block.

Previously this didn't happen, and the worst thing is that the world does not re-open until an app deletes the part where this is caused.

I looked this because in my farm of Blazes makes use of an block 'n' redstone for suffocate him and kill them with a punch.
I had to erase the mechanism since an different Chunk because this closes the game, at the moment of get closer