Can no longer tab to folders in "Move to" drop down menu

A few months ago I switched to New Outlook and have been generally satisfied with it. However, maybe a month ago something changed and I was no longer able to search for a folder in the "Move to" tab and tab down to it. I used to be able to do this, and now when I tab it selects the X then on the next tab closes the drop down menu.

A tiny thing, but so frustrating!