Issues with stairs when I use NavMeshBounds

Hi there, in many of my levels I use stairs. In these stairs,AI must follow you. That’s why I use NavMesh. However, as you might notice in the image below,while in the first stairs there is the green path,while i add stairs,the path doesn’t go any further. In the A and C sets of stairs,the angle is 0 degrees, In the B set of stairs i have rotated them a little bit downwards,but still as you might see,the path doesnt exceed any further. On the right side you can see the settings that I have in the Navmesh.

Any help will be appreciated. It has become such a nightmare.