Stations disappeared?

This morning I started Roon to listen to the radio, but all three links were gone and I was asked to add station.
Not a big deal to add them, so thats not the point, just wonder how it could happen?
I use Roonserver on a Windows Server 2012 machine. Remotes are on iMac and Samsung tablet.

I found this too this morning on my iPhone. I went to a laptop (also remote) and the stations were present. Went back to iPhone and they appeared too.

Not sure if this is a small iPhone app glitch or (just as likely) a glitch caused by a WLAN range problem.

We’re your observations on remote? Or across the system?

They were gone on my two remotes. An iMac and a Samsung Galaxy tab.