If they are disappearing it points more to a network discovery issue. This could be down to a number of things. How are the devices connected to the network? Wired or wireless. The Allo USB bridge is known for lossing connections to DACs so this will make it disappear this has nothing to do with Roon itself.It happened all the time when I had one so it had to go. There is a setting in the dietpi os to help with it but never fixed it permanently.
I have both a USBridge and Digione both running DietPi. They both stay on generally and they are (99% of the time) generally visible in Roon. I connect over Ethernet, so a wired connection. If @Dan_Mason can tell us a little more about his set-up we can comment further. I can always double check the settings on mine to see if anything is different.
Main reason I tagged you @tahsu is maybe it’s not your power outages causing your issues… maybe it’s a DietPi thing like I suggested in the HQPlayer thread. If Dan is having the same issues with DietPi, maybe there’s something in common. Maybe not but maybe.
Its possible @dabassgoesboomboom, thanks for tagging me in, but I don’t generally have the problem with Roon specifically just HQ Player. I am still happy to check settings @Dan_Mason my end if thats useful.