Question Physics haywire

[Andysan]

In a scene I'm working with when the model is replaced with any other model, the legs go into an endless loop of jerking back and forth (crouched). It's very apparent with shake-it plugin she looks like she's having a seizure. Still persists without plug in. After comparing with original model the leg proportions are almost identical. I also checked the joints and they have the same settings. Any ideas?
Also in the same scene the vagina is constantly spasming after penetration and sticks to the dick and gets ripped out her. Is the 2nd issue something that needs to be fixed with collider editor?

Do changes made with collider editor get saved into the appearance preset?

TY for any guidance you can provide.

 

[Andysan]

I figured it out. Never assume you know what is causing a problem it was the guys dick collider. It was way to wide half way down and she was noping out as soon as she got there.

She reacted pretty much exactly as I would expect a girl faced with this problem irl. She slid off to the side and her knees started shaking lol. Sometimes too much realism is a problem...