Did you ever get the above resolved?
We are getting to where the WebChat interface is too unreliable to use.
What happens is similar to what you are describing.
What happens is:
a.) Person A - logs on.. make themselves available.
b.) Person B - logs on.. makes themselves available as well.
c.) Person C - does the same....
at some point person a or b or c.. can have a chat with the others. no problem.
BUT, person A, somehow no longer shows themselves to be available.. from Person B or Person C perspective.
"A" - thinks they are available, because they still show green AVAILABLE...
so now person B and C can't chat with person A... and Person A doesn't understand why no one is communicating.
This happens everyday....
I have looked in logs, but don't see anything too revealing.