The reason I used "accidental" is because it's not a bug (and you've alluded to that same conclusion too). You could argue it's accidental from the perspective

The reason I used "accidental" is because it's not a bug (and you've alluded to that same conclusion too). You could argue it's accidental from the perspective of DDG if it happened by chance rather than design. But the distinction between "accidental" and "unintentional" is nuanced and I'd already offered "intentional" the alternative option so I'd argue you can pretty much use them interchangeably in this specific situation.