I remember something similar with Internet Explorer back in the day, where it would ask for the favicon (which we didn’t have setup at the time) so our 404 page

I remember something similar with Internet Explorer back in the day, where it would ask for the favicon (which we didn’t have setup at the time) so our 404 page would be returned, which then seemed to trigger another request for a favicon. (╯°□°)╯︵ ┻━┻