To be able to rotate the actor I get a reference to it on Construct via getActorOfClass and then use that reference on the rotation logic.
Could you check there that if you use GetAllActorsOfClass (instead of GetActorOfClass), that it only contains one element? Cause if that actor is not replicating and you only spawn it locally, then there should only be one of it and it should make this here
However I do not know how I can get a reference to the spawned render-target actor while using the the owner/relevancy logic.
irrelevant since there is only ever one of them 