Upgrading from 5.3.2 to 5.4.2, replication broken

I have a tank asset that uses Chaos Vehicle Movement Component. I have it setup to continuously rotate in place upon spawn, without any possession of the vehicle, works fine in 5.3.2.

I then opened the project with 5.4.2 and upgraded the project in place.

5.3.2- The server rotates the tank and the clients replicate the rotation…

5.4.2- no replication appears to occur, only server is rotating.

Any insight into why?

EDIT: 5.4.2 replication occurs only when the tank is possessed. 5.3.2 doesn’t exhibit this constraint.