Already noticed the problem, I kinda figured out how to fix it

Some other models like simfphys, LVS, other vehicle models non drivable turned into improper position, hollowed glass only or invisible.

It even occurs with NPCs. with only the lower torso.

Originally posted by Specneo:

It even occurs with NPCs. with only the lower torso.

maybe don't try to turn father grigori into a pancake, then

Originally posted by Specneo:

It even occurs with NPCs. with only the lower torso.

Its also been happening to NPCs that have bones with "physics" in the "upper torso" with out doing anything to them.
Basically it starts off by making it look like the NPC is "hyperventilating" in Time-laps while going faster and faster until the NPC's upper torso suddenly disappears leaving nothing but the lower torso, arms, legs and head.
(I only found this out when I was experimenting with this mod (and it also seems to effects Rag-dolls in the same way))

@LUL Fixed