When we set the 'reversescale' attribute, the 3D Surface Plot seems to stay unchanged, only the colorbar is affected. To reproduce the bug, you can adapt the example [Topographical 3D Surface Plot with Plotly.js Charts](https://codepen.io/plotly/pen/MaxrwW) (use the version 1.43.0 and set the attribute 'reversescale' to 'true'). The result is [here](https://codepen.io/cuckooland/pen/GPGQLJ).