Hi support in answer to the questions
Both versions are the same
Compression is currently on - (turned off now to see if any impact)
Nothing apparent in the logs that I can see
Problem is now I have come back and opened VC this morning, everything is back to normal and the problem currently does not exist. This has been the behaviour before when this has happened. The other way I mentioned is to stop and start the VC service. I have turned compression off now to see if that makes a difference, but it is not possible that I know off to repeatably trigger this issue. So I will update again when we see the problem.
Thanks Brett.