Apologies re the latency in responding, I seem to have not noticed the ping for your response.
It relies on the Long Term Statistics, so shouldn’t be related to the Recorder limit. What your screen shot tells me is that it’s picking up data, but isn’t associating it properly with a scale. I did rewrite some of the logic, so you might want to try the latest commit to see if that resolves it. If not, I’d be happy to have a closer look.