When I start a roast, I add the roast details, including temperature and humidity, via the active roast view. When checking the roast details after it’s done, all the details (including temperature) are there except the humidity. So that data point is not persisted.
If I then edit the roast and add it, it does persist.
I have both and R1 V2 and an R2 Pro, and looking back at previous roasts, it seems to be an issue with the R2 Pro.