4.20 PhysicsConstraintComponent DedicatedServer

There is a project with 4.19 or 4.18 SourceCode,
use PhysicsConstraintComponent as below picture , run at dedicated server ,
when connect dedicated server and running ,Connecting objects(use PhysicsConstraintComponent ) and connected objects(use PhysicsConstraintComponent ) will run very perfect;
But with 4.20,Connecting objects and connected objects position will not replicate,
client’s position is failure but dedicated server is ok!
My code has not changed at all , Only 4.19 to 4.20 . How and what i can do ?!
thanks a lot