Mesh3d ignores lighting with orthographic projection

It seems like lighting of Mesh3d is ignored when orhogonal projection is used, example image:

With exactly the same plot, but with perspective projection, lighting is fine:

I just wonder if this is a known issue, or is it a bug somewhere?

I tried to play around with camera locations and lighting parameters (diffuse, ambient, etc.).

Only ambient lighting has effect when orthographic projection is enabled (as you can see in the picture above the whole mesh only has a single flat color) - maybe shader issue?

The version of plotly.py that I am using is 5.6.0.

首先在 plotly.py 5.6.0 中使用正交投影和透视投影复现 Mesh3d 示例，然后比较渲染行为并调查疑似的 shader path。完成的标准是：在正交投影下，漫反射光和其他非环境光会影响网格，同时不会导致透视渲染发生回归。