This has been a weird issue for me but whenever I use rotators on a floating vehicle (like a ship or even just a platform), the rotator seems to cause the entire craft to move.

A lot of ships I've seen posted don't seem to be affected by even several rotators, but even if I use just one rotator, my ship seems to just wiggle as if being pushed by it.

I've tried playing around with their weights, the ship's buoyancy, the damper multiplier, setting my physics on high and low, and probably some extra things too so I'm out of ideas...

May I have some help with it? And an explanation too please?

Thank you!

Here's the ship:
https://www.simpleplanes.com/a/KlFUav/ship-WIP
(note: there's some white platforms inside the ship that have buoyancy)