Whenever I go onto Minecraft Pocket Edition it freezes randomly after a couple of minutes, or a few seconds.

Okay, so for some reason whenever I go on Minecraft Pocket Edition in my iPad, it freezes and forces me to exit the tab. This morning it was completely fine but then a couple of hours later it started freezing. It would usually freeze whenever I would tap on something such as the chat button or whenever I would place down a block. Sometimes I would just randomly freeze while loading up the game or while joining someone else's world. It would freeze a couple minutes after going onto the game. Please fix this problem as soon as you possibly can, thank you!