layout.spikedistance = -1 causes missing spike lines over non-scatter traces.

[ngnpope]

When using layout.spikedistance with a value of -1, which is supposed to mean "no cutoff", and layout.xaxis.spikesnap with a value of 'cursor', I expected the spike line to be always visible in the plot area when moving the cursor across it. Indeed, when looking at my codepen, this is the case for the first scatter chart.

When I have other types of traces, the -1 value doesn't seem to work in the same way and the spike line isn't rendered or can occasionally be seen between the traces. Changing to a value of 9999 then works, but only over the traces and not between.

Interestingly, combining scatter and bar partially works, but results in some flickering when hovering the mouse back and forth.

[ngnpope]

Annoyingly it looks as though my codepen didn't save everything, but I have partially fixed it to show enough of the problem.

[etpinard]

Thanks for the report!

[ngnpope]

Fixed by #4637.