Navmesh not refreshing on level instance load

I created a level instance containing a landscape and a navmesh bound volume. My persistent level has a Navmesh bound volume and also contains a landscape. when I move the Navmesh bound I generate a raycast-Navmesh around my invokers. The problem is at runtime the navmesh disappears when I load in the level instance map.

My nav setting are: UE5.1.1
Dynamic and spawn Navmesh around invokers


I retested it by replacing the landscapes with large cubes and added a level script jiggling the cubes , the Navmesh refreshed only after moving the cubes. I can’t do that with landscapes because they are locked. Is this a bug or am I missing something?

Still having the same issue in UE5.2