BBB will not boot from SD card with USB device plugged in

[Patrick Failing]

I have 10 BBB from 4 years ago and 10 from 2 years ago.  When I have a USB device plugged in, the BBB will not boot android from SD card every time.  This does not happen with the older BBB and is random on the new BBB.  I do receive babble interrupt error.  I also measured the voltage out of the USB port on the BBB and it is 5 volts when it boots and about 3 mV when it doesn't boot.  I have tried power supply with 5V and 3 amps but this does not resolve the issue.  I have tried different distros of Linux and this does not help.  When the BBB does not boot, it resumes when the USB is unplugged.  I am desperate and looking for help.  If there are any contractors who can assist that anyone knows I would appreciate their info.