Crouch button not working

 If you try to crouch in Minecraft Pocket Edition, you will find that the crouch button is extremely unresponsive, and it almost feels like it is just a matter of luck.

Expected result: No problem crouching at all, it works fine.

Actual result: Very hard to crouch, have to resort to spamming the button.

How to reproduce: Just touch the crouch button, you will find that it is not registering most of the crouches.

  This affects all gameplay and could lead to losing multiple hardcore worlds. I have seen other reports of this bug saying that this bug is resolved, but in reality, it's not. Also, I would like to clarify that if using an Xbox controller, it works just fine. I am talking about touch screen.