Contour not shown correctly in 3D Tri-Surf Plots

When plotting the 3D tri-surf figure, if we don't specify the facecolor of the plot, the contour will work well.
However, if we specify the faceolor of each faces, the contour will be stuck in the middle can't move and the coordinate
of each vertex also doesn't show its correct x,y,z.
The examples in the tutorials also have this problem.
Not sure if there have other way to specifiy the facecolor without making these issues.
Thank you very much for your help!

fig <- plot_ly(type = 'mesh3d',
  x = c(0, 1, 2, 0),
  y = c(0, 0, 1, 2),
  z = c(0, 2, 0, 1),
  i = c(0, 0, 0, 1),
  j = c(1, 2, 3, 2),
  k = c(2, 3, 1, 3),
  opacity = 0.5,
  contour = list(show = TRUE, color="#000", width=15)
  #facecolor = toRGB(viridisLite::viridis(4))
)
fig

fig <- plot_ly(type = 'mesh3d',
  x = c(0, 1, 2, 0),
  y = c(0, 0, 1, 2),
  z = c(0, 2, 0, 1),
  i = c(0, 0, 0, 1),
  j = c(1, 2, 3, 2),
  k = c(2, 3, 1, 3),
  opacity = 0.5,
  contour = list(show = TRUE, color="#000", width=15),
  facecolor = toRGB(viridisLite::viridis(4))
)
fig

Beginne damit, die beiden bereitgestellten R plot_ly mesh3d-Beispiele aus dem Issue auszuführen, und vergleiche die Konturbewegung und Vertex-Koordinaten mit und ohne facecolor. Verfolge den 3D-tri-surf-Renderingpfad, um den Unterschied zu identifizieren, und betrachte das Issue als abgeschlossen, wenn facecolor keine falsche Positionierung der Kontur oder falsche Koordinaten mehr verursacht.