Level streaming breaks nav mesh and the ai

when i create sublevels to load and unload my ai no longer moves even if I set the generation to dynamic. why is that and how do I fix it?

okay guy’s it looks like i accidently placed the nav mesh inside a sublevel that’s why the ai wasn’t moving, but i have 2 more problems here:

how do i use nav mesh staticly with level streaming?

how do i make so that the ai can also load unload levels by walking into a trigger? cuz right now the ai just falls through the world cuz there’s no level.