Using Infuse with Jellyfin, I have a reality show with > 200 seasons. Every episode for a season greater than 199 is displayed in “Season Unknown” by Infuse. They’re displayed correctly in Jellyfin.
There is some Jellyfin weirdness. I had checked that it had Seasons 200, 202, etc. But now I see that it also has duplicate entries for those eps in “Season Unknown”.
Also, while it doesn’t have episode titles anywhere, it at least has the episode number “13. House Hunters International” for the eps in the Seasons < 200, but not in those 200+.