The engine is unable to Level that has a Blueprint actor with a child actor component that has a particle system component. The follow message pops up:
World /Game/LevelName.LevelName is in use.
Running the editor with '-NoLoadStartupPackages' may help if the object is loaded at startup.
External referencers of World /Game/Level.LevelName:
GCObjectReferencer /Engine/Transient.GCObjectReferencer_0 (root) (1)
0) [[native reference]]
Tested in 4.22.3 (CL - 7043647), 4.23 (CL - 8386587), 4.24 (CL - 9485528)
1. Download and open the attached project
2. Delete the NewMap Level
Expected: The NewMap level would be removed from the Content Browser
Result: An error pops up
There's no existing public thread on this issue, so head over toAnswerHub just mention UE-81574 in the post.