Camera rig does not replicate rotation offset to server but to all clients

Using the new camera rig and Unreal 5.6.0, based on the Game Animation Sample camera logic.

I have set a simple rotation offset of -15 degrees:

It works in single player as expected.

In multiplayer, the clients have a different offset than the server. The clients have the proper camera rotation (so some replication is happening?).

For the local players, the server camera rig behaves as expected and as it does in single player. So I assume something is wrong with the replication to the server only?

Simulated proxies are not applying the offset.
Control Rotation and Base Aim Rotation are updated.