Things have been fine recently with Roon.
However, in the last 15 minutes, I have encountered a new problem. I queued a new list of favorite tracks last night of about 7 hours duration. I played about 2 hours of the queue, and paused Roon to call it a night. I unpaused Roon to resume playing the tracks about 45 minutes ago with no problem, I had full Roon remote device management.
15 minutes ago my iPad and iPhone lost connection to Roon Core. Both devices had plenty of memory available (no additional memory use was implemented during this time) I also checked to ensure that both devices were on my WiFi network as opposed to the neighbors - no problem there. I have rechecked several times over the last 15 minutes and Roon still does not connect with either device, yet the queue still plays with no issue.
I just cannot control Roon via the iPad or iPhone.