Hi Bob,
I have seen the same issue using my Linux desktop and both MacBook Pros I have (One running Linux and the other running the MAC os)
I think it's more in internet issue vs a problem in the application. It is somewhat more severe if I am using a wireless (WIFI) connection. My desktop computer is connected directly to the router via ethernet cable and it's not as frequent as the other computers using WIFI.
Another ham I know is using wireless home internet by T-Mobile, and a wireless WIFI home LAN, and he's always disappearing from the reporter and reappearing.
Also, I think there could be issues with the network load on the server(s) used for the reporter. Maybe the numbers of users increasing is contributing to the problem.
Mooneer may jump in here with info on that.
73/Rick
W4XA