Incorrect hover label for missing last value with hovermode `x-unified` and `tickson=boundaries`

plotly / plotly.js

Open-source JavaScript charting library behind Plotly and Dash

https://plotly.com/javascript/

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Incorrect hover label for missing last value with hovermode `x-unified` and `tickson=boundaries` #7152

Open stephprobst opened 2 months ago

stephprobst commented 2 months ago

In this codepen the hover label for the last x axis value is incorrect. It displays "AC" in the hover, even though the correct value should be "Other".

The problem seems to be related to the missing last value (null) in the line trace. If that value is present, the hover labels work correctly.

The problem disappears when changing the width of the chart or reducing the number of data points.