After letting the comments @Flamiii left brew for a while, I realized they were very much right about the buzz slider thing. As such, I've implemented a quick and dirty untested fix that will hopefully have zero unintended side-effects :)
I don't see this as a permanent or final solution yet. There's definitely some potential issues/inaccuracies that could arise with maps like Notch Hell or IOException's Black Rover, but afaik this implementation would not cause any issues that stable doesn't already have.
Related to: https://github.com/ppy/osu/issues/27674
Relevant log output for that particular case:
[network] 2024-03-20 07:25:30 [verbose]: Performing request osu.Game.Online.API.Requests.GetBeatmapRequest
[network] 2024-03-20 07:25:30 [verbose]: Request to https://dev.ppy.sh/api/v2/beatmaps/lookup successfully completed!
[network] 2024-03-20 07:25:30 [verbose]: GetBeatmapRequest finished with response size of 3,170 bytes
[database] 2024-03-20 07:25:30 [verbose]: [4fe02] [APIBeatmapMetadataSource] Online retrieval mapped Tsukiyama Sae - Hana Saku Iro wa Koi no Gotoshi (Log Off Now) [Destiny] to 744883 / 1613507.
[database] 2024-03-20 07:25:30 [verbose]: Discarding metadata lookup result due to mismatching online ID (expected: 1570982 actual: 1613507)
[network] 2024-03-20 07:25:30 [verbose]: Performing request osu.Game.Online.API.Requests.GetBeatmapRequest
[network] 2024-03-20 07:25:30 [verbose]: Request to https://dev.ppy.sh/api/v2/beatmaps/lookup successfully completed!
[network] 2024-03-20 07:25:30 [verbose]: GetBeatmapRequest finished with response size of 2,924 bytes
[database] 2024-03-20 07:25:30 [verbose]: [4fe02] [APIBeatmapMetadataSource] Online retrieval mapped Tsukiyama Sae - Hana Saku Iro wa Koi no Gotoshi (Log Off Now) [Easy] to 744883 / 1570982.
[database] 2024-03-20 07:25:30 [verbose]: Discarding metadata lookup result due to mismatching online ID (expected: 1613507 actual: 1570982)
Note that the online IDs are swapped.