Cloud9 constantly 'reconnecting...'

Hi,

I don't know why but when I'm using Cloud9 I constantly (every 10 seconds or so) see a 'Reconnecting' message pop up, in yellow, at the top middle of my tab. It didn't used to do this but being done so for months now. This is the only site I see this kind of behaviour, my wifi connection is strong. Any ideas why or how to fix?

Thanks,

Mark