Scenario: I have a plot with two y axis overlayed where trace data is loaded asynchronously so there is no guarantee of order. When a trace that belongs to the y axis overlaying the main y axis is loaded first, the plot generate 2 set o graphic elements on SVG representing the trace: the first as a subplot and the second as an overplot of the mainplot.
Here is a live example: https://codepen.io/vinipitta/pen/WMGdbx
(Just drag the defective trace (trace 1) to see the duplicated trace remain still while a copy moves on the right y axis.)
Looks like since there is no trace loaded in the main y axis, the plotinfo.mainplot is undefined when the trace is added to the overlayed axis generating a subplot. When a trace is added to the mainplot, the overplot group is populated with the previous trace and the former subplot ins't removed.
function makeSubplotLayer(plotinfo) {
var plotgroup = plotinfo.plotgroup;
var id = plotinfo.id;
var xLayer = constants.layerValue2layerClass[plotinfo.xaxis.layer];
var yLayer = constants.layerValue2layerClass[plotinfo.yaxis.layer];
if(!plotinfo.mainplot) {
The simplest workaround is to set the layout.yaxis.overlaying or layout.yaxis2.overlaying based on where the first loaded trace belongs to.
This issue seems related to: #2227
Scenario: I have a plot with two y axis overlayed where trace data is loaded asynchronously so there is no guarantee of order. When a trace that belongs to the y axis overlaying the main y axis is loaded first, the plot generate 2 set o graphic elements on SVG representing the trace: the first as a subplot and the second as an overplot of the mainplot.
Here is a live example: https://codepen.io/vinipitta/pen/WMGdbx
(Just drag the defective trace (trace 1) to see the duplicated trace remain still while a copy moves on the right y axis.)
Looks like since there is no trace loaded in the main y axis, the plotinfo.mainplot is undefined when the trace is added to the overlayed axis generating a subplot. When a trace is added to the mainplot, the overplot group is populated with the previous trace and the former subplot ins't removed.
The simplest workaround is to set the layout.yaxis.overlaying or layout.yaxis2.overlaying based on where the first loaded trace belongs to.
This issue seems related to: #2227