When properties are customized on an Add Component node, and the component is replicated, the client will create the component without the customized properties. This is likely due to subobject replication only using the CDO to construct objects on the client, rather than the actual template object used by AActor::AddComponent.
See UActorChannel::ReadContentBlockHeader for the client subobject creation code.
Need to add an EngineTest for this!
There's no existing public thread on this issue, so head over toAnswerHub just mention UE-81528 in the post.