Changing the line edit of a combo box in a table view delegate commits prematurely

Setting a new line edit for an editable combo box when used as a delegate editor for a table view value, commits before the user can select anything.

The reason seems to be that when the old line edit is deleted a focus event causes the editor to commit.

A workaround can be removing the delegate's events filter for the combo box during the change.

See the demo showcasing both a working and a non-working case.