Hi @alexcjohnson,
Thank you for the answer. I did not consider there is a bug within json files, but in the way the heatmaps, contours or surfaces are defined in the examples posted by the author of PlotlyJS.jl. A Julia user following those examples could be confused on why he doesn’t get the right plot. I asked here about how plotly.js interprets the arrays to be able to argue on the PlotlyJS.jl repo why they must transpose the z-arrays.