HighlightedIndex is lost when the drop down is opened and the ItemsSource is replaced.

The default behavior when the focus is inside an input control and it's Text is changed is that it's caret is placed in the beginning of the next text. This could be observed in the WPF TextBox control.

In certain scenarios modifying the SearchText while the focus is inside the control is a desired behavior. In those scenarios the caret position is expected to be set to the end of the new text which is set to the SearchText property.

Make it possible to customize the built-in AsyncFilteringBehavior by inheriting it or it's interface

When the Populate method is called from the control's GotFocus or PreviewMouseLeftButtonDown events, moving the parent Window does not close it's DropDown.

Available in LIB Version 2016.3.1010, it will be also available in the 2016 R3 SP1.

Initially the events is triggered correctly and after switching between TabItems the event is not longer triggered. 

The issue also is reproducible inside RadDocking control.

The control is focused after the SelectionChanged event is triggered when selection is made with the mouse

Should be clicked somewhere else afterwards in order to refresh the cursor.
The fix is available in R2 2016 SP1.

Clicking the ScrollViewer of the control causes the focus to be retained by the RadAutoCompleteBox, leading to double mouse click required in order to access outside control.

Also the mouse cursor is changed IBeam value rather than the default Arrow value.

The fix is available in the 2016 R3 SP1 release.

After removing an item with it's remove "X" button, two mouse clicks are required in order to lose the focus from the control.

Available in LIB version 2016.2.606, it will be also available in the 2016 R2 SP1 release.

When you set TabIndex property the control still uses the default value.

Available in LIB version 2016.1.314, it will be also available in the 2016 Q2 Release.

When the SelectedItems property is bound, moving items inside that collection causes ArgumentException.

Available in LIB version 2016.3.1017, it will be also available in the 2016 R3 SP1 release. 

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

Add a possibility to set minimum populate delay to the control. It would be useful if a property like MinimumPopulateDelay is available to be set which would cause the populating of items to be delayed. Such feature would be helpful for cases when making requests to web server etc.

Available in the R3 2016 Release.

Please check our help article for more information:
http://docs.telerik.com/devtools/wpf/controls/radautocompletebox/features/key-properties#setting-noresultscontent-noresultscontenttemplate-properties

Available in LIB version 2016.2.525, it will be also available in the 2016 R2 SP1 release.

As a developer I would like to be able to implement a custom highlighting logic of the items in the DropDown portion of the control so that I could implement a "best" matched item highlighting.

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 there is only one item left in the drop down or it is the first item, when it is clicked with the mouse the events are raised.