Combo appends text after Shift-tabbed action

[zdrawku]

Description

When using MS Edge, and SHIFT-TAB is pressed to bring focus back to the Combo box and the user attempts to type, the Combo then appends as opposed to clearing, as the highlighted text would suggest.

Steps to Reproduce

Open this jsfiddle sample

1.Select a value in the combo box
2.Select control before combo box
3.Tab into a combo box.
4.Tab past the combo box.
5.SHIFT-TAB back into the combo box
6.Enter Text

Expected

The combo clears and just contains the typed text.

Actual

The combo appends the text instead of clearing.

NOTE

This is only replicable by SHIFT-TABBING back into the box. A GIF has been attached replicating it in the example code in the Angular API documentation, using Edge.

Image