Steps to reproduce
Press Ctrl+O to display the document list, type or select a document, press Enter.
Able to edit the selected document immediately.
No longer in list edit mode. Have to press Tab (sometimes twice in Firefox) to start editing.
I also have to press Esc twice to cancel the document list and start editing again. The first Esc only dismisses the window.
Windows 10, Firefox 54, Chrome 59.