Problem description:
I can activate 48V and adjust the settings for the gain etc. from Fireface Settings. When I click "Store" and disconnect from my computer, the gain settings are retained, but phantom power is turned off immediately.

It also appears that I have to have the phantom power *off* in the Fireface Settings dialog when I reconnect the device to the computer to be able to reactivate phantom power, but I haven't fully confirmed that this works every time. Sometimes I need to turn the device off and on to get it to turn phantom back on.

Some prior forum posts seem to indicate that this should work, and the manual doesn't mention a limitation, but I'm just trying to confirm whether this is expected behavior, as the unit works in all other ways the way it's supposed to.

I'm using a Mac on Big Sur; I have the September 2021 driver update and the most recent firmware (which appears to be 2012). I'm connecting through a Firewire > Thunderbolt converter and running off the power supply.

One note: This problem does not manifest on my Fireface UCX, which stores the phantom power setting via Total Mix.