Thomas Shey
Legend
Likely a combo. Also, sometimes published adventures have what appears to be a balanced and/or challenging encounter and its not. At least that was my experience in the PF1 AP era. Of course, that system is notorious for CR being all over the place so it was likely more off balance then. Which likely put me in the habit of looking closely at encounters as part of my GM prep.
As noted, it was absolutely a problem with the first couple PF2e adventure paths, too.