If there are two line graphs and one of them is at least 2 shorter (blue graph), only the tooltip on the very right is displayed, independent from which area is hovered.
If the shorter line graph is filled up with null until they reach the same length, the tooltip is shown correctly.
The red arrow shows where the tooltip should be (where the chart was hovered).

If there are two line graphs and one of them is at least 2 shorter (blue graph), only the tooltip on the very right is displayed, independent from which area is hovered.
If the shorter line graph is filled up with null until they reach the same length, the tooltip is shown correctly.
The red arrow shows where the tooltip should be (where the chart was hovered).