D-pad will sometimes invert it's controls. Sometimes pushing up on the d-pad will move Steve backwards instead of forwards, pushing down on the d-pad sometimes moves Steve forwards instead of backwards, sometimes pushing right on the d-pad will make Steve move left, and lastly, sometimes pushing left on the d-pad makes Steve move right.

i don't know what causes it, but an easy fix is to move the first person camera around a bit, and then the d-pad will work as intended. The bug happens on bedrock 1.13.2 and onwards.