Quick answer: Unreal Iris relevance state holding temporary actor refs after they're destroyed? Iris doesn't auto-clean - hook OnDestroyed to remove from relevance.
Pickup spawned; client adds to relevance; pickup despawned; client still has it.
Hook OnDestroyed
Actor's OnDestroyed: notify Iris to drop relevance.
Or use BeginPlay registration
Actor registers on spawn; deregisters on death. Lifecycle clear.
Audit relevance state
Per-tick relevance count; investigate growth.
“Relevance state outlives actors. Cleanup is responsibility.”
If your Iris relevance grows without bound, the cleanup is missing. Audit.