While exporting search results to DOC format, a dialog to ask which grouping fields I want to use is opened.

I'm typing the first letters of the group and the widget auto-fill my combo with the first result (step 1), but I select manually another result. The text is still there (step 2) and when I try to leave the combo without selected the auto-fill value, the value is automatically selected (step 3).

Note : The behaviour is different when I type letters of the wanted column but not the first ones as "contrib" for example.