The 12-month average has been negative since January of 2023. Their zoom on mobile doesn't work very well, I earlier missed a similar year or so of negative 12-month averages around 2016, but in general going back to the late 80s the adjustments seem to have heavily favored the side of adjusting up rather than down.

Its not a huge indicator and I didn't imply anything should be read into it, but it is an interesting change in the long-term pattern worth looking into.