Beatmap Sorting by Most Played for non-std gamemodes does not sort properly

[MassiveRainbow]

Beatmap's when sorting by Most Played for a game mode that is not standard is biased towards hybrid sets that include standard difficulties. I believe the system as it is does not sort by playcount on difficulties of the given mode but by the overall playcount within the mapset.

As an example, when sorting by most played for osu!taiko using this filter (and also having osu!taiko set as my default gamemode on my profile) the first 100+ results are all standard sets from before 2020 with a minimal number of taiko difficulties included.
Also comparing the playcount of exclusively the taiko difficulties of the top 5 results show these are not in order.

1. Harumachi Clover (Swing Arrangement) [Dictate Edit] Muzu + Oni (187245 + 95967) = 283212
2. quaver Muzu + Oni (131958 + 75069) = 207,027
3. Black Rover (TV Size) Muzu + Oni (151335 + 82215) = 233,550
4. Cookie-Butter-Choco-Cookie Muzu + Oni (106892 + 57684)= 164,576
5. Despacito ft. R3 Music Box Muzu + Oni (63801 + 31410)= 95,211

I find this worrying because the playcounts of the #4 and #5 top result respectively are below the playcount of a pure taiko set like Excuse My Rudeness, but Could You Please RIP?<3 (t+pazolite Remix) which has 175,130 plays.

This issue also exists for Catch the Beat and to a lesser extend osu!mania. It makes it harder to find full sets that the community of that mode replay often (working as somewhat of a quality filter) and thus better convey the way this mode is meant to be experienced. It makes it hard to find good sets to build up a library of maps to develop yourself as a player of non-standard modes and I would like to see this changed.

[nanaya]

That's because there's no data on per-mode playcount. The playcount for converts are counted together among all modes so if we're going to use that it means those will be ignored for other modes and the playcount for standard mode will be (slightly?) inflated.