I'm having my brand new 150 replaced.
Same issues. Its paired, works great. Then i go into my music, choose a song, then choose a tone....
I back out of it to the main screen. On the left menu under TONES No Device in grey, Under TOOLS , level is greyed out and will not select.
Under settings, Device Flash..... Device Flash Version: No device.
So close the app. Re open the app and it syncs.
Go to the my music and the SAME THING.
I have performed all the recommendations, however sporadically placed on their support pages they may be, and all firmware is current.
IM GIVING THEM ONE LAST CHANCE BY REPLACING THIS UNIT. IF SAME ISSUE OCCURS ITS NO LINE 6 PARA NADA.