Once the suggestions  dropdown for RadAutoComplete is opened, If we click on the Hamburger icon , the suggestion  dropdown does not dismiss at all.

If the AutoComplete is nested inside a modal Popup and Unfocus() is called on SuggestionItemSelected or Completed, the cursor/focus stays within the AutoComplete.

The same does not happen (the AutoComplete is properly unfocused) when the control is placed in MainPage.

When the AutoComplete is placed inside a modal popup, the dropdown can't be closed on WinUI when clicking outside.

If you have an AutoComplete control as the first element of the visual tree of the page, when you open a Popup control, the popup takes the focus and after closing the popup, the focus is set back to the AutoComplete - if there is text in the AutoComplete input, its SuggestionView is shown without user interaction with the control.

For example when adding input controls (entries) inside the NoResultsTemplate, I want to type in the entries but the focus is moved to the Autocomplete control. Same behavior with SuggestionView and SuggestionItem Templates

On macOS the focus is on the Entry inside the templates