Me and this other dude have been complaining that the SPACE bar (fairly common START mechanism) doesn't work well in the Jukebox.. That is, if you use the space bar to STOP the jukebox you get "kicked out" of Juke box mode. At that point starting and stopping will ONLY happen in the current song', no advance to the next jukebox song will happen.

You CAN use the SPACE bar to start a Jukebox song, but you HAVE to let it finish. If you stop it, you're outta Juke box & the SPACE bar resorts to starting & stopping THAT song only.

Well.....on to YOUR thread's discovery......r and p donj't work at all. BUT....the START button DOES work in the Jukebox if you use the mouse. So you can stop the song, and if you restart by mousing the START button, the jukebox will show in the title bar, and the next song will load & play.

So in conclusion;
the r and p keys don't work at all in Jukebox (if stopped, r starts the RECORD function :-/ )
Space starts a jukebox song from the beginning. If allowed to proceed to the end the next song loads & space can start it, etc....
Space will stop playback of the song in jukebox, but restarting that song w/ space will NOT advance to the next juke song...you're stuck
The only way to restart a stopped Juke song is to hit ttthe Start button in the Juke window. (although, to restate: space can start a juke song from the beginning without hosing up the juke box functionality)

I hope this clarified your correct observation that the Juke box is seriously flawed......although I appreciate learning the new knowledge that mousing the start button on the Juke window will restart the juke process.....

Keep in mind that the word Jukebox will appear in the title bar of the program window when the jukebox is properly active.

Regarding the Footpedal.....
I have SPACE, "a" and "b" programmed.
The Space starts the songs......I have "Dont Start" selected in the jukebox ....I start w/ the spacebar footpedal
I keep the conductor window open....the "a" loops the current chorus, and "b" shuts off the loop.

What I wish is that they'd make the "a" a toggle that turns loop chorus on & off......then the third pedal could do sumpin else.....
That all works ok, but ya gotta let the song finish or jukebox goes off.