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

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#1

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.

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

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This is my configuration. What is wrong with me?

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#2

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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?

#3

Hi

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