Foliage spawned by the foliage tool doesn't affect the navigation mesh volume?

Hello everyone,

I’ve placed thousands of trees in my map and placed a navigation mesh but the trees don’t affect the nav mesh volume. Is there an option to activate that the trees affect the nav mesh volume?

I just realized that not only foliage but also static meshes don’t affect the nav mesh volume.

Make sure that you have the collision setup for your assets.
when you click the key “P” on your keyboard you should see the nav mesh in the editor.

Runtime nav mesh change: runtime video