Hello @jbruno,
Thanks for the additional details.
I believe this is not a problem with the USB port, but the same problem from your other post regarding the DRP.
Can you confirm this by testing another device such as a flash drive, usb hub and/or input devices with your custom board paired with the Verdin iMX8MP?
This way we can rule out a hardware issue with your custom board.
I will reply on your other post to further debug that problem.
Best Regards,
Bruno