Hi Kendo Theme,

The current behavior will re-render the Chart and the tooltip or crosshair disappear and the user will need again to hover over the series. This behavior can be observed in the following example:

https://stackblitz.com/edit/angular-dmpexe-sf8zoj?file=src%2Fapp%2Fapp.component.ts

The desired behavior would be to keep the popup open or the crosshair present when updating the data.

Thank you for your consideration.