Grouping two Linn Sneaky Music DS?

Hello Linn friends

I have two Linn Sneaky Music DS. I can group them in Roon, but the added streamer doesn’t play. If I try and group them outside Roon using Linn app, I have the same problem. One is setup to stream with amp engaged and internal volume enabled. The other is just streaming with volume fixed and amp disabled. Any ideas?