While you are noclipping if you shoot yourself with something that allows you to rocket jump (the two I know being the Firework Launcher and the Wand), then you will be put into a sudo-noclip. Which is being able to fall through anything without being able to fly.
The only way to stop it from happening is to re-noclip.
- Shoot yourself with anything that lets your rocket jump.
Either the Rocket propel you back, but not knock you out of noclip.
OR rocket jumping does nothing to the player while in the noclip state.
I’m unsure if it’s meant to be this way as it could be made into mini games to see how long someone could rocket jump for before they fall through the map.