@MrKuBu
Does it look like Smooth Sync is blocking the rotation on the owner? (or server if there is no owner)
Or is it just not being synced over the network?
In either case, maybe take a look at:
SmoothSync.setSceneComponentToSync() - Used to set the Transform that you want to sync. If none is set up, it will sync the Actor. Must have one SmoothSync for each Transform that you want to sync.
If that doesn’t help your issue, let me know and I’ll have to dig deeper. Thanks!