From time to time i can see that my vera2 shows "server busy", even when i don't make any changes or something else.
Always when the "server busy" message shows up, sq remote is struggling with getting the information from Vera.
I've tested this several timers with always the same result.
You may to have a look at your logs. I had an issue a while back where I was getting the "server busy" popup a lot. It turned out those were Lua engine restarts after crashes. You may have something taking down the Lua system, in which case there's nothing for SQC to talk to...
--Richard