I figured something was up when on a d20 I rolled 7 "1"'s on 10 rolls. Further, none of the rolls were above a 10. Second gaming session proved similar somewhere between 50-60% rolls were a "1" and the remainder below 10 except for a "12" and a "14". When it started happening again during my 3rd game session, I began rolling on my Hero Labs Online and was encountering the normal distribution of rolls as expected. I switched from my Chrome browser (Version 101.0.4951.67 (Official Build) (64-bit)) to Firefox (100.0.2 (64-bit)) and amazingly enough, the Roll20 rolls normalized! Even had a "20" in there from time to time - as well as the occasional "1". What gives?