I shall try, in this wordy two-parter:
Infuse, on its own, only gets metadata from one service: TMDB.
TMDB assigns every TV show in its library one of these 16 genres:
The genres currently available for TV shows are:
Action & Adventure
Animation
Comedy
Crime
Documentary
Drama
Family
Kids
Mystery
News
Reality
Sci-Fi & Fantasy
Soap
Talk
War & Politics
Western
You’ll note there is no independent genre for “Action”, nor is there an independent genre for “Adventure”.
Likewise, there are no independent genres for “Fantasy” nor “Sci-Fi”, nor are there any for “Politics” nor “War”.
There are such independent genres utilized at TMDB, but they are exclusively genres applicable to movies.
TMDB does have support for independently applied genres for five of the above six genres: “Action”, “Adventure”, “Fantasy”, “Sci-Fi”, and “War” — but only for titles in the Movie Category.
There is not an independent genre for “Politics” — neither in TV nor in Movies. The word politics doesn’t even exist among TMDB’s possible genres for movies. I’m not sure why. Presumably they think such titles are also likely to be either documentaries or dramas, histories or thrillers. I find it an odd decision, personally.
I also find TMDB’s dumbing-down of TV genres both odd and offensive:
“Game of Thrones”, “House of the Dragon”, “The Lord of the Rings: The Rings of Power”, and “The Underground Railroad” are Fantasy series.
“The Expanse”, “Black Mirror”, “The Man in the High Castle”, “For All Mankind”, “Severance”, and “Star Trek” are Sci-Fi series.
However, since TMDB does not tag these shows differently, neither is Infuse able to differentiate them. However, until recently, Infuse treated the three combined TV genres (as depicted in bold text in the full list above) as separate genres.
This resulted in one list for “Action” TV, and an entirely redundant 2nd and identical list for “Adventure” TV, sitting right next to each other on the TV genres bar. Infuse offered two genres to choose from, but each led to the exact same titles.
Far more sensible to just combine the buttons to represent the way TMDB (in their infinite and unmalleable wisdom) chose to define every series in their database.
What Infuse has done is to end its practice of breaking out the 16 TMDB genres incorrectly to 19 different lists — showing “Action” apart from “Adventure”, “Fantasy” apart from “Sci-Fi”, and “War” apart from “Politics”.
If you use other Metadata sources exclusively (Plex, Emby, Jellyfin) — you should notice no changes as the genres shown by Infuse will match whatever the external server says they are.
If you have multiple TV series for which Infuse is the primary metadata provider (via TMDB), Infuse will now respect TMDB’s data and no longer split genres that TMDB has deemed are the same.