I have some actors that are set to be Replicated with some relatively small Net Cull Distance. If the player pawn is derived from Character, when it comes close enough to those actors, they become visible correctly. However, when the player pawn is not derived from Character, for example a vehicle or just derived from Pawn/DefaultPawn, those actors don’t become visible no matter how close the player comes to them.
It’s interesting that when the player pawn starts already close enough to those actors, they are replicated correctly.
Here’s a clean project where you can see this bug: Cahoots — Ann Arbor tech coworking
(use PlayerPawn pawn and come to the cylinder BSP, the sphere actors won’t become visible)