Sneak button on D-Pad acts like the forward button when flying or when the HUD is hidden via /hud

If the spot where the sneak button on the d-pad would be is being pressed when flying, the game thinks that the forward button is being pressed instead, even though there is no button there.

Steps to reproduce:

1. Load any world
2. Double-tap jump to fly or run /hud @s hide all
3. Press the area the sneak button just disappeared from

Expected results:
The character does not move.

Observed results:
The character moves forward.