A basic example of the issue is using the Popover with a Grid: https://blazorrepl.telerik.com/cyuGvQPB37aekvo514.

On initial load, the Popover is properly attached to the span elements in the Grid cells. If I filter, however, the elements are disposed and re-initialized - after that, the Popover is not attached to the new elements even though they have the same class used as a target selector.

When the anchor element is changed, the Popover remains on the old one.

Repro: https://blazorrepl.telerik.com/QeluluPY55SngO9C35

Popover throws an uncaught JS exception on the Popover show. When the ShowCallout parameter is set to false, the exception is thrown, because it tries to set a class to a non-existing callout.

The AnchorSelector parameter of the Popover should support runtime changing. Currently, to change the parameter value, the app must recreate the component by removing it temporarily from the page:

https://blazorrepl.telerik.com/GeEinkvw42carE5f35