Not getting energy consumption readings from 1 switch (LZW30-SN)

I’ve got several of these set up - all reporting energy consumption apart from this one switch. I’ve tried excluding and re-including, I’ve tried a factory reset and I’ve adjusted the percentages on the energy reports (to 5%). No matter what I do it reports ‘0W’… and I can’t figure it out, any pointers?

Update on this - it’s started working. Not sure why it took a little while!