I have decided to give it one more go too, setup again this evening. No data coming through yet. I will feed back my experience here.
Unfortunately setting up again means loosing historical data in Smartthings
After 7 days of data coming in it has stopped again.
I will email the support as suggested, hopefully this will help Samsung and chameleon work out the issue if they don't know already.
I thought I would give a quick update. I raised a ticket with Samsung support and they said it was a problem for Chameleon to look at and I should contact them and gave a number to call (no email or web ticketing system). I called them up and a very helpful person said they don't normally deal directly with customers but said they would look into it. Shortly after this with no communication from Chameleon the data started flowing again. It has been working now for another week.
So it would appear the issue is indeed data collection on the Chameleon side. I see a lag of a day or so visible in my second screenshot.
Will continue to monitor and contact Chameleon if (when it stops again.
Following on from my post 4 weeks ago the data continues to flow into Smartthings perfectly. No idea what Chameleon did to resolve it but now I have well over a months data without any issues. 🙂