Happens in gravity and with grappling hook.
- Sector change >20km/h
- Jump drive
- Warp gates
- /change_sector / admin warp sometimes too, but rather rarely
They all make astronauts jump 3-4 blocks upwards, causing them to get stuck in narrow corridors or get pushed outside the ship. (Most likely happens for npc's too but they show other issues, hard to test it out)