Closed
Description
This plot is throws an error whenever I hover in 1.28.2:
https://codepen.io/rsreusser/pen/bRRBjg
Uncaught TypeError: Cannot read property 'length' of undefined
at Object.exports.appendArrayPointValue (plotly-1.28.2.js:113510)
at _hover (plotly-1.28.2.js:113987)
at Object.hover (plotly-1.28.2.js:113608)
at SVGRectElement.maindrag.onmousemove (plotly-1.28.2.js:138465)
Apologies this isn't a simpler plot type, but I've noticed this while working on groupby and the splinter tests now seem to be failing because of it. I tried and failed to reproduce it with a plain codepen, so this is the first time I've been able to reproduce it in a couple lines.