Four weeks ago, or so, I had a brand new MU1 in house for audition. I broke the seal on the box. That's how new it was.
Roon would play about 8 seconds (never hearing it through the system), and then skip ahead to the next track, where the process repeated infinitum. After several power downs and resets, the situation would not correct. The MU1 had the most recent Roon software, as did the Roon app I was using.
Taking a feed from the MU1's USB port worked fine. The digital outputs from the MU1 processor was where the problem occurred.
My other Roon enabled streamer and DACs worked perfectly using the same LAN feed.
It was quite disappointing. I returned the MU1 to the retailer the next day, with a request that when they solved the problem to please contact me because I'd still be interested in the audition.
I never heard anything back from the retailer.