[PROBLEM] Moode won't start if a USB stick with music is present

[Ouchita]

Swap in a different power supply rated for 3 Amps.

Hi Tim,
I have used 19V 3.42A, and 20V 3.25A power supplies. No difference.

However, I have found that, on my 3B+, it works if the root usb drive is in either of the 2 USB ports nearest to the ethernet port. It then doesn't make any difference which port is used for my musi usb.

This is certainly different to how it worked on previous versions of Moode, whereby I always had the root usb in the top slot furthest from the ethernet, and the music usb in the bottom slot next to the ethernet. (I had this habit to make it easier to extract either usb stick.

I have done all the testing for this correspondence on my Pi3B+ with HiFiBerry AMP2.
I will go through tests with diffferent Pi3B+, AND the IqAudio DAC PRO, as well as the Suptronix 400.
(This will take a while ! )