That’s interesting. It definitely used to report the amount of improvement on the printer’s console (what you call the HMI) when it was done.
I’ll try running it again, and if it’s still there, I’ll photograph it so that we’re all on the same page.
Meanwhile, based on my previous test (sample size of 1), it did indeed seem to perform as expected within the advertised tolerance:
This is where I was able to show the improvement on a print that was already properly shrinkage compensated.