Navigation mesh have invalid regions

Hi,

This bug have two variations:

  1. We have a huge map, with 1000 actors and foliage placed in a scene (trees places via Foliage tool). And we have the same incorrect space in navigation mesh. Bug continue to exist even after deleting all the objects from the map. I dont not know how to reproduce that.

  2. I’ve done some research and turn out that the bug caused by trees collision, i captured a video showing steps to reproduce this bug in a simple way, where the only object in a scene is a tree.

Have you been able to reproduce this in a clean project?
Yes, you need trees only. I atteched the archive of a project, with a minimum assets enough to reproduce the bug Dropbox - Error - Simplify your life

If so, what are the steps I can follow to reproduce this on our end?
Here is video https://youtu.be/H3gQMAc2tGQ

To be clear, the level is completely empty other than that Nav Mesh Bounds Volume?
As i told before, there is two variations of this bug:

  1. The level is empty. Map contains NavMeshBoundsVolume and RecastNavMesh-Default only, (but level contaned a lot of actors in first place, but the bug is still exists, even after deleting all of them)

  2. Level contain single tree foliage, with collisions turned on.