BUG: Ghost traces after zooming/panning when data has gaps (null)

[dbuezas]

After zooming, a second trace appears and stays in the same spot independent of further panning.

Here's a minimal way of reproducing it:

Plotly.newPlot('myDiv', [{
  x: [1, 2, 3, 4],
  y: [1,null,3,4],
}]);

https://codepen.io/davsbb/pen/WNKeVba

[alexcjohnson]

Thanks for the simplified example @dbuezas !

Seems this problem appeared between v2.14.0 and v2.15.0 - @archmoj the only thing I see in there that touched line drawing is the angleref work #6297. Let's put this in line for immediately after the 2.17 feature work is complete.

Meantime, if you're hitting this problem please downgrade to v2.14.0