[BUG]: Plotly.Fx.hover error when used on Plotly map

[platinops]

Description

I want to have multiple traces get hover labels when I hover on one of the traces. This is similar to this example: https://plotly.com/javascript/hover-events/#coupled-hover-events

When I hover on one of the points, I get a JS error.

Steps to reproduce

• Go to this codepen
• Hover on one of the points
• Console shows error similar to: Uncaught Error: Invalid LngLat object: (NaN, -1.1977990340856948)

Notes

The error occurs on this line:

plotly.js/src/traces/scattermap/hover.js

Line 56 in 65265d7

var lonlatShifted = [Lib.modHalf(lonlat[0], 360) + lonShift, lonlat[1]];

The reason is that xval, and therefore winding and lonShift are undefined.

If I add lonShift = isNaN(lonShift) ? 0 : lonShift; just before this line, it works fine: