Navmesh generation randomly not working, any help appreciated

The image below illustrates when the Navmesh generation works as expected

But sometimes(~10%), the game will not generate the navmesh when the level is loaded, resulting in a broken AI.

and once this happened…

We a re loading the level like this

The NavMesh Bounds Volume is at the Persistent Level and the game open ForestStart first.

Below the NavMesh Bounds Volume Navigation settings and navmesh system settings

I really appreciate any help or suggestions. I’ve been scratching my head for a few days now…

My problem is not totally the same but my Nav Mesh was working perfectly and then suddenly it won’t work. I can see it in the editor and get it looking like I want it, but when viewed at run time, it

has not updated. Hard to explain and I’ve tried everything I can think of. Nothing works. Just wondering if you had any luck soughting it out ?

Same problem , I tried everything!