Specifically BodyDepth/Height/Width/HeadScale.
Resizing the character using the default R15 Scaling options if they’re sitting in a seat will crash the entire server.
Repro:
- Load up any empty baseplate and insert a seat part, anchored or not.
- Load in your character (Make sure they’re R15)
- Sit in the seat
- Edit BodyDepthScale or any of the scales found in Humanoid
- Wait for the crash.
Recording:
Even the slightest change in size will cause this like setting the scale from 1 to 1.0001.