Odd loss of playlist

Hi last night I had some odd behaviour and was wondering if anybody else has had this or similar. I was playing to my Uniti Atom which is Roon ready when all of sudden music stopped and Roon had lost the Zone, although it was still available in the app to choose, I switched back to it but it had completely lost the play list and nothing was in the queue. I could have lost network to the atom at this time but I would expect it to reconnect and pause the stream and not clear.my queue.