Performans Issues On Android

I am not sure if this is a bug. But my phone can handle so many good Games, but on minecraft, it starts dropping fps, it drains my battery too. I mean my battery is big. And my phone has some good specs.

IT crashes A LOT too. (FPS startes dropping then it freezes, after that it closes itself) 

 

Phone:Asus Zenfone 5(ZE620KL)