This bug sucks

When I was playing MCPE, I putted coal on a furnace. I putted the wrong ammount of coal I wanted and I tried to took it away.
I was expecting to get my coal back but instead, minecraft crashed. When I opened the app again, I looked into my furnace, and it was gone. I looked at my inventory, and it wasn't there niether. Please fix this bug and this is a bug that I really hate and I would like it if you fix it.

Sincerely, Dawelny rodriguez

Minecraft gamer.

This is pocket edition not PC version.

P.S MERRY CHRISTHMAS!!!!!!!!!!!!!!