Pressing movement buttons on pocket edition occasionally trigger a hit instead of movement

When you tap the arrow buttons on your screen while you are tapping to hit something, sometimes the client thinks that you are trying to hit something and the game doesn’t recognize that you pressed the movement buttons 

steps to reproduce: 

tap on a movement button and a different place on the screen at one time, then slide your finger that is on a movement button

sorry for no vid, I know it is a weird bug but it is a very frustrating bug