1. Get the "Failed to cast" issue (e.g. by attempting desktop mirroring, then denying permission).
2. Without dismissing the error message, start another route.
3. The error message remains on the sinks list view and the icon remains orange (if shown), although we now have started a successful casting session.

The issue remains until the error message is dismissed.

I think it's confusing, especially for the icon to stay in the "error" state despite having a working cast session. It also doesn't help that the default dialog view shown while casting is the details view, which doesn't show the error message.