HumanoidStateType.Physics not working on NPC humanoids

I’m trying to set an NPC’s humanoid state type to Physics like this

clientHum:ChangeState(Enum.HumanoidStateType.Physics) 
print(clientHum:GetState())

However, the print keeps returning HumanoidStateType.None. Anyone know why this could be happening? The NPCs are made like the player but they have ball socket constraints on certain parts for ragdoll effects. I’m not sure why this is happening since the state should be Physics. Is Physics depreciated?