When custom items populating with delay is implemented the first item in the drop down is not highlighted

If the AutoCompleteBox is in SelectionMode="Single" editing the text of the SelectedItem will cause the textbox's CaretBrush to go to the end of the text.

Esc should be handled only when the popup is opened.

When an Item is selected, the SearchText property should be updated so it shows the item's text. At the moment it stays with the last entered text. The scenario is valid only for Single mode

When an Item is selected, the SearchText property should be updated so it shows the item's text. At the moment it stays with the last entered text. The scenario is valid only for Single mode

If the control is placed inside ScrollViewer when the mouse is over the AutoCompelteBox control the mouse wheel is handled leading to no scrolling of the ScrollViewer.

As a workaround the Foreground property of the AutoCompleteBox can be set to Black.