Butt and breast spazzing out

[Jimo5]

So I installed everything needed to make body physics work, the skeleton, body slide, a physics compatible body, and everything seems to be working fine. Except my character, where sometimes her butt starts to wiggle randomly and her breasts bounce in a non normal way, like one stays still while the other one moves. As for other characters the physics body seems to working normally.

Does anyone know how to fix it?

[DeliveryGod]

Is your framerate locked? Physics tend to go mental when the Vsync is off and you run above about 75 FPS. (75 isn't an exact number, it's just what I've been able to run the game comfortably at without too many issues)