Provide a way to blur the background of the popup, so that the user cannot see through it.

When adding for examples, ComboBox/AutoComplete, Pickers inside RadPopup and open the pickers/combo dropdown. Then close the RadPopup, the popup of the pickers/combo/autocomplete stays open. The behavior occurs on iOS, MacCatalyst and WinUI. On Android exception is thrown.

The Popup is not correctly positioned on Windows when changing the size of the window by Minimize/Maximize. 

Currently when the user taps outside the non-modal popup, the popup is dismissed. We'd need to provide a way to set focus to input fields in the page without removing/closing the popup.

When the Popup control is attached to the page, the "Top" and "Bottom" options of the Placement property does not respect correctly.

When popup is opened and from it navigate to a new page, the popup does not close and stays open on the new page. 

If I double click on Button (popup is attached to this button and opens on a button click) ->  in macOS, iOS, Android, the Popup opens and then closes. While in Windows, the Popup is still open.

When opening a modal page when using Shell.Current.PushModalAsync, on iPad the popup inside this page is not centered, partially cut or not visible at all. It works on Android, iPhone, MacCatalyst and WinUI.