Possibly the effect of content blockers, some will block all ads and tracking, some ads only, some tracking only - depending how each person has their blocker set up.
My guess would be the “Adsense day” is not the same as your “day”. For example, if your day is midnight-to-midnight your time zone, it could be Adsense is using a different time zone for its “day”, or maybe its day is a dynamic “past 24 hours”