Quick answer: Unreal PCG graph debug toggle persisting references to spawned debug actors after disable? Debug system doesn't clean up actor refs - manually delete or use Resimulate.
Toggled debug on; saw 1000 debug points; toggled off; outliner still shows the actors.
Use Resimulate after disable
Resimulate flushes; debug actors removed from level.
Or manually clean
World Outliner; select all debug actors; delete. One-time pass.
Avoid leaving debug enabled
Save with debug enabled = save references. Habit: disable debug pre-save.
“Debug visualizations are temporary by design. Persistent state is a leak.”
Add a 'clean PCG debug actors' button to your editor utility. Cheap to run; ensures clean state.