For now best solution I have is adding a box collision as obstacle, but even that is flawed
For some reason the navmesh doesn’t react to the full length on bigger sizes even though the collision box is there, on top of that to make it refresh I need to place another obstacle near it temporarily.
Also the assets are in a streamed level and the navmesh in the persistent level.
Also found this topic still unanswered that also has the same problem.