Mesh3d triangle disappears if I set all y-coords to [0,0,0] but reappears when [0,0,0.1]

plotly.js
1

Here’s the function for my graph. The mesh3d triangle disappears if I set all y-coords to [0,0,0] but reappears when [0,0,0.1]. The problem is not that the mesh3d is outside the range of the visualization.

y: [0,0,0]
image

y: [0,0,0.1]
image

2

Hi! Were you able to find any solutions?