Hello,
I re-read your post and I think there is no bug, let me explain.
If you save your changes in the Studio with the "Restart Players" of course all players get the new updates and restart fine, good.
If you save your changes without the "Restart Players" checked than your changes WILL get saved but it WILL NOT apply to the Players UNTIL you click on the AIRPlayer reboot icon.
I hope this makes sense, let me know,
Alon.