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Setting enableHighlight on legendSettings to false does not disable legend highlight when highlightMode set

I have a slightly unusual use case where I force the legend to have items that do not correspond to the series plotted on the chart (basically I use series with no data points to trigger the legend entries and then give no name to the series with data points - I won't go into the reasons for this here!).

I still want the series plotted on the chart to do highlight in series mode when hovered over, but since the legend items aren't connected to any plotted data points I want to disable hovering over the legend from triggering highlighting behaviour.

I saw that legendSettings has an "enableHighlight" option however it seems that it defaults to false anyway and when set to false it seems that if highlightMode is set then the legend highlighting happens anyway. To me this would seem to be unexpected behaviour - since there is an enableHighlight option on the legend I would expect setting it to false to disable the legend triggering highlighting regardless of whether the plotted points of the series have highlighting.

Example here.

If you hover over the legend entries in that example it highlights the series corresponding to the entries despite enableHighlight being set to false in the legendSettings.