This latest update has failed to pick up many images that have obvious noise in them.
Finding noise is sometimes inconsistent. Images taken with identical camera settings and lighting conditions sometimes call for Denise and sometimes they don’t generate any d
enoise reaction.
I have found that too. My picture with 1250 ISO from a 2012 camera, obviously noisy to a certain extent, did not have Denoise active in Autopilot. It had to be turned on manually.