How is sorted the "IMDb seen" page?

Simply by curiosity, how is sorted the "IMDb seen page. Example: https://www.imdb.com/seen/nm0000005-director-movie/

It doesn't seem to be ordered by release date, nor by the number of votes, nor by alphabetical order of the original title, nor by alphabetical order of the English title, nor by popularity. I wondered if it was totally random, but it doesn't seem so because in the case of Ingmar Bergman's filmography the list seems to have 3 configurations (see pictures below).