Engi Jumpy Boots
It’s actually a much larger problem than just with the rocket boots, though it seems to happen most often after using rocket boots. It can also occur rarely any time you start moving after stopping, especially if you do so to perform an action like harvesting. It even breaks autorun, often requiring you to hit the key 3 times before you’ll start moving again. If I remember right it appeared in a patch about a year and a half ago and my attempts to report it fell on deaf ears. It drove me absolutely insane trying to play Super Adventure Box world 2-2 because it kept happening when trying to jump forward so it would jump up and then start moving forward, instead of jumping forward like I was trying to so I’d go half as far as normal and fall into a pit.