Hello NCNerd :^)
Sorry for what happened. This bug is relatively rare and it seems to be caused by a combination of details linked to a problem that I was unable to find in my code combined with the set of certain players (always in the same 2 places, the ones you as cited). I have never been able to determine precisely where the problem was coming from.
The best I can do is invite you to try with another web browser, if you haven't already done so.
Sincerely sorry, I would like to help you more.