Inherited sections which change the volume must be placed before the note which is supposed to have different volume to ensure the volume will apply if the player plays the note earlier or later. Kiai might be still snapped on the note, but if it changes volume, you have to put additional inherited section with same volume before the note.
This is quite an important thing. There are songs where the volume change fits, but if it is exactly on the note, player can play it even just -1ms earlier and this will cause that game will use the volume before the note, because the time has't passed the line on the certain note which should have been muted. Because of this, the intherited section should be earlier than the note that should have volume changed, at least with such gap so the volume change will apply if he hits a note - if he clicks so late or early so he misses the note, there does not have guarantee of the right volume - player is not supposed to play on this place. Basically the 1/4 gap between the note and inherited section is mostly enough. This does not that strictly apply to steams, since you cannot make enough big gap.I think this should definitely be considered, let's see if this can mve forward. For case it is confusing, feel free to ask. Thanks