Using a replicated subobject with a replicated property using the COND_InitialOnly replication condition, after an actor has performed its initial replication create a new instance of this subobject on the actor and replicate it.
Expected: Because this is the initial replication of the subobject, the COND_InitialOnly property will be replicated.
Actual: The bNetInitial RepFlag is only set for the actor's initial replication, so this property is never replicated.
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-126303 in the post.