The ragdolls created by the combat system do not work in Udon worlds for remote clients. Locally the ragdoll still works, but for other players you will look like you are standing still when you die.

Repo worlds:

Udon world using combat system (use a tall avatar and crouch through the tunnel, then stand up on the other end):

wrld_8e929d87-ecc0-4c7f-b513-a81758a408a9

SDK2 world using combat system (join different teams and shoot each other):

wrld_d466194c-ef53-4812-9a2c-bdb4c5e2b037