Ignore the missing scrollbar; that's a separate long-standing issue ;).

3. q

As part of another long-standing issue on Xmonad (I guess because it
doesn't really do invisibility/minimisation/what-have-you), this
actually retains the *Completions* frame (which is still highlighted as
focused by the WM), but now neither frame looks "active" (all three
visible cursors are hollow):