(First, the "every tick" event does nothing, it's literally just for aesthetic when you don't want to leave an event blank.)
From what I understand:
You have an invisible sprite named camera to more easily locate the camera on the field. Did you use a "Scroll-to" behavior or did you make your own code for it ?
Also several thing you might want to check:
Is only the camera stuttering, or does the camera "object" stutter too?
Did you check in debug mode whether only one player has ActorNr set to Photon.MyActorNr ?