Using FluidForces on experimental makes the player vibrate

When using the FluidForces option in game.Workspace, setting it to experimental makes the player vibrate.
https://www.youtube.com/watch?v=2LmjyQRvQe8

Happens on server as well.
Specs:
16GB ram… uhh… I forgot the rest

Expected behavior

It shouldn’t usually vibrate, so this is weird. When it’s on Normal it doesn’t vibrate.

A private message is associated with this bug report

Thanks for the report! Are you using the legacy Humanoid in this case, or the new, physics character controllers (Releasing Character Physics Controllers)?

I’m using the legacy humanoid, I believe!