Slaphead
500+ Head-Fier
new firmware is available.. lots of changes and bug fixes
https://www.forum.rme-audio.de/viewtopic.php?id=28859
as always if yours isn't causing issues, don't make any with a new firmware.
Good advice in general, but the ADI-2 DAC and PRO have fallback firmware encoded into the device itself, so if the firmware update fails for any reason, the unit will automatically fall back to the firmware that was originally delivered with the device.
I did the upgrade this morning without problem and it took around 10 seconds including turning the unit off and then on again.