There is a problem with tooltips that are shared when there are multiple series on the same axis.
Replication:
1. Line chart with 1 x axis (date or category)
2. Line chart with 3 y series (number)
3. Tooltip with shared set to true eg:
tooltip: TooltipSettingsModel = {
enable: true,
enableAnimation: false,
shared: true
}
If the last series only has 1 value, then this value is displayed on all tooltips. Tooltip has no template, default settings but with shared: true.
See below: