In my game https://www.roblox.com/games/401356052/Karaman-Station#!/game-instances
I have invisible default roblox characters running around. Locally I put on a fancy character model and ragdoll it when the character dies. The character itself is just positioned somewhere else and the 3 Motors connecting the fancy Ragdoll left leg, right leg, and lower torso to the Torso on the invisible real character are removed.
When they are removed the physics doesn’t update the fancy ragdoll to fall over (It just stands there awkwardly) unless you walk up to it and ‘claim’ ownership of the physics.