autoplace doesn't ignore invisible 2/3/4 voice notes
That's an invisible 3rd voice, because my timpani sf2 has actual rolls, they're just hidden in octaves timpani never uses. Same thing happens if you use an invisible 2nd voice.
This is a regression from 2.3.2, which of course ignored invisible notes as it ignored visible notes, lol.
Turning off autoplace is the workaround.