Stupid lagging out

Ok so idk if its just my iPad but for some reason whenever i play minecraft, I get to play for like 20 seconds and it lags out.mi tried freeing up some space and I have 6/12 GB free, and it still lets me play for 20 sec and lags. Can you try to fix this

Joyncenalover about Minecraft: Pocket Edition, v1.1.3