When using a NavMesh with Dynamic Modifiers Only, parts of it disappear and don't come back

There’s a big vehicle that makes holes in the navmesh. With works fine, most of the time, but in some areas (these are always the same areas, although it seems to be different areas in the build and editor…).

The world is using world composition. When I go to the areas without the vehicle, the navmeshes are still there, but if i drive there, parts of them are just gone. They are not red, they are just not there. Other areas directly adjacent work fine.

Everything works fine with Static or Dynamic navmeshes, except the vehicle doesnt make a hole in the navmesh with Static.

Any idea what might cause that?