NanaParty
commented
8 months ago upon further investigation, no two players are needed, and you dont need to apparently apply the beatmap before starting a lobby. all one person has to do is start a lobby on their own, put something like HDFL, set the timer to start at 10 seconds and then go back into selection again while hovering over another gamemode and it still applys the bug. the bug will still submit scores with those ghost mods applied while also saving replays with it.
(edit 2: I take it back it still does submit on global leaderboards with the ghost mods, I think this needs to be higher prio because of that.)
peppy
frenzibyte
Type
Game behaviour
Bug description
as far as I'm aware, it needs two people to replicate, one person hosting and one person with the mod setup
we'll call player X the host and player Y the mod user
X will setup an open lobby with round robin beatmap selections on whatever beatmap they like (any gamemode) and Y will setup mods to their liking, lets say HDFL in this scenario
when the beatmap from player X is selected as the first beatmap, player Y will add another beatmap from another gamemode on top of that, still holding onto the mods from selection on the first beatmap and apply the other mode beatmap into the lobby. it will visually reset their mods on clientside but then keep the mods serverside (displayed by the lobby member's list) and will apply to the player Y's mods. Player Y then goes back into the beatmap select to put another gamemode again, but without selecting, Player X will start the match. Player Y should then be playing the mods that were selected prior but visually only to them, they will be playing NM (or DT if the map is DT at all) the entire time. This applies to every mod combination possible and does save to replays, seemingly also submitting to bancho for the multi to register the point differences between players. it does not seem to give performance points due to mod combos nor submit to the actual profile.
an additional point to mention, when using HR with this bug it causes sliders to have absurd SV compared to normal when still playing out as a "NM" play to the user, this was done with Taiko as a setup so I'm quite unsure as to why it would do that other than the fact that scroll speed on taiko is correlated to HR itself, which might be a hint possibly to why the mods act this way when swapping around modes
Screenshots or videos
setup video https://youtu.be/vVa_nXOoZqo
View from both an outside player and the player with the "mods" https://youtu.be/5ZZ7WKdSRtw
Version
2023.1231.0-lazer
Logs
compressed-logs.zip