changing autocolorscale via Plotly.restyle only works on first try

[antoinerg]

As shown in the following Codepen: https://codepen.io/anon/pen/VVybMO?editors=1000

[etpinard]

This one is a side effect from mutating gd.data[0].colorscale

In the codepen above, the graph starts out with gd.data[0].colorscale: 'Viridis', after the first restyle(gd, 'autocolorscale', false), line

plotly.js/src/components/colorscale/calc.js

Line 92 in 11bec79

doUpdate('colorscale', scl, container.reversescale ? flipScale(scl) : scl);

sets gd.data[0].colorscale: [[0,"rgb(220,220,220)"],[0.2,"rgb(245,195,157)"],[0.4,"rgb(245,160,105)"],[1,"rgb(178,10,28)"]] and the original Viridis is gone.

I wonder if there's a way to make colorscale attributes behave like autobin attributes post #3044 ?