If I destroy an actor the collision will stay.
Just a default cube static mesh with a box collision.
i dont think the collision stays. maybe provide some footage and/or pictures and also if you really think that it is a bug.
Reproduce the same bug in a new project. if the same thing occurs then report to: Report a Bug - Unreal Engine
It does cause my units will then pathfind around where the cube used to be and I can’t move into it.
I just went back to 4.21 gonna wait till 4.22 bugs get worked out.
It sounds as though it is being destroyed but your nav mesh isn’t being updated which is why your units are walking around, because there is a hole left behind from the mesh.