Volume doesn't save on note overlapping with a hold note

[Redd56]

Type

Game behaviour

Bug description

when in editor editing hitsounds sometimes the volume does not save added context: before i hit save and exit set both single hits to 33% volume and the hold to 0, save and come back and it just doesnt save it this has been happening alot in random spots on the map, some areas will save the volume and some will not

Screenshots or videos

https://user-images.githubusercontent.com/12189828/181995119-9188b9a2-d1ac-4a6f-9cda-792a765de1c3.mp4

Version

2022.731.1 lazer

Logs

database.log network.log performance.log runtime.log

[Redd56]

may be related to https://github.com/ppy/osu/issues/15618

[frenzibyte]

Different volume specifications for objects on a specific time can't work because they'll all be encoded back to the stable format (which is one control point per time). May need to indicate that somehow, potentially by only showing one bubble rather than multiple at a time. That's not quite possible with the way editor timeline is structured (where each hitobject provides its own volume bubble).

[peppy]

The format should be fixed instead.

[frenzibyte]

Not sure how feasible that'll be though since it involves manipulating .osu files, unless it's fine changing the legacy beatmap encoder to include additional properties in control points? (I suppose that's the reason why we have lazer beatmaps set to v128)

[peppy]

This issue should be resolved via #23308.