Spawned Prefabs with Mesh Components dissapear when players leave area and then return

Summary

When spawning prefabs, occasionally elements will dissapear from the client when a player leaves the area then returns later. This happens on a procedural island we are making where we spawn 25 different rooms. When running through the first time, players see all elements correctly. When running through a second time in the same session certain meshes do not render. The meshes that don’t render are random and change per session. We do not have streaming enabled.

Please select what you are reporting on:

Unreal Editor for Fortnite

What Type of Bug are you experiencing?

Assets

Steps to Reproduce

Create a system that procedurally spawns rooms using custom meshes for the walls, floors and ceilings. Make a few variations of the Prefabs and add them to a pool. Spawn the elements into a scene. Run through the elements once then return to the center of the map. Run through them again and you’ll start seeing elements dissapear.

Expected Result

Mesh Components should be rendered correctly and not be culled upon returning.

Observed Result

Random Mesh Components do not render on specific prefabs. It seems to only affect one or two prefabs out of 25 or so that are spawned. The prefabs it affects seem to be random.

Platform(s)

PC

FORT-970502’s status has changed to ‘Ready for QA’. A member of the QA department is investigating the issue.