I edited the pitch deltas of the accidentals in a complex Tonality System in 12,000 EDO (a Just Intonation notation system). These edits were minuscule, corrections of one to five steps. ie. thousands-of-semitone. The devastating result was that most of the accidentals in my already completed score have disappeared. The playback is still correct.
Unless there’s some trick I’m not aware of, I will now have to go through every single note of my complex score and add the accidentals.
That the playback is intact helps me in this particular case but generally speaking, I think it’s a bug. It has created extra work for me before. When music that’s written in a microtonal Tonality System is copy-pasted on a 12EDO staff, the microtonal accidentals will be gone, as expected, but the VST tuning data (which is invisible and impossible to edit) remains. So an E natural might still be microtonally inflected in the playback and will only be transposed to the correct pitch after selecting it an (re)forcing it to E natural (by pressing 0).