whenever walking on a block with the top 1/8th missing (Grass path, tilled soil, or soulsand) the player moves without a keyboard input. im not able to walk forward  once I reach the end of a layer of blocks. if the terrain changed to netherrack on the same level im not able to move forward without jumping. its like the input is overridden from player input to automatically moving backwards if im standing on the blocks. ended up being forced backwards and fell into lava and died. rip.