If i’m in the song screen and press SHIFT+F2, the pattern is added without its swing settings. If I then try to add the swing as an event, it only displays the swing in 8th notes, not the pattern default of 16th notes. I can’t find a way to add the the pattern default swing setting this way.
The first 16th note swing event is me pressing SHIFT+F2 and the pattern swing entering the song as expected.
The second 8th note swing event is me manually adding it from song mode. So I don’t think it does default to the pattern setting, otherwise it’d be 16th notes.