At a glance, it appears the reason for a +1 to the ConsiderList allocation size is to allow for potentially adding the WorldSettings on 1857. I’m not sure where the other +1 comes from, but that 2 should be a variable so its significance is clearer (although maybe it should just be clear to me). I am surprised that any network relevant actors (checked on line 1945) wouldn’t have been included in the round up on line 1800.
Have you logged what your NetRelevantActorCount is set to on line 1800 and then World->NetworkActors.Num() on 1879? Maybe some of that output will explain why 8 and 14 pass and fail, respectively. Let me know, I’m curious!