Ditto here. I came here because I was first getting the blinking blue light of death described here, but I was finally able to connect using a powered USB hub and I guess get enough juice to it for the device to be recognized enough to update the firmware (which is now current as of Jan 19 2022).
But all of that was with 48v phantom power off. Any time I turn phantom on, even after the device has been recognized in the Universal Control software, the entire device dashboard just lights up - including red leds, and all stay on solid - and the device just disappears out of the software interface like I had disconnected it. Turning off the phantom doesn't revert back to a working device; I have to physically remove the USB power and reconnect it for the device to reappear in my computer as an available audio interface. I'd really like to use this with condenser mics, but it seems a pretty big design flaw that we can't. I hope there is an answer available from PreSonus, please? Thank you!