Browse fwd/back buttons on controller doesn't move to second browser window

As the title - if I use the fwd/back buttons to cycle between browser windows (ie the main browser, the four playlists and the folder tree) it doesn't move to the second browser window if it's open. Seems the only way I can get to that is using the computer rather than the controller. Is there a way to make this happen?  I can't find anything in the MIDI mapping that will make this work. Using RB 4.5/5.0 and a DDJ-SZ

Mike