Why do different models with the same height lead to different path results?

When I use a normal plane and lower the rotation angle, the path can be generated, but once the rotation angle is higher, the entire path will not be generated.

When I replace the plane with the prefab of the stairs, the path cannot be generated, no matter how I lower the rotation angle.

This is my configuration. What is wrong with me?

No matter how I adjust the settings and the position of the prefab, they cannot be connected. Do I need to provide a minimal project?


What is your max slope angle? Have you tried increasing that?