Physics ragdoll must be made with phyiscs joints. You can't use Pin or hierarchy to connect body parts to each other.
Hierarchy may be used only to spawn the ragdoll. Here is how you do it:
- Disable Physics by default for all body parts.
- Disable all "Transform X/Y/Width/Height" checkboxes in hierarchy properties for all body parts.
- Spawn the parent object, for example Body. All other body parts will also be automatically created.
- After "Wait 0" enable Physics for all spawned instances, pick children of this Body and create physics joints to them.
Here is an example from my game
(I don't need to pick children, because there is only one ragdoll on the layout at all times)