They get edited back. I've been playing this game for 10 days. I edit once or twice, then delete a few days later, and there's still comments popping back.
the delete event is the trigger thier automation uses, they can't trigger on the edit event as there are too many legit uses of it. However undeleting by default for a time period is easier and will result in less tickets.
they can’t trigger on the edit event as there are too many legit uses of it.
They definitely do, I've experienced it firsthand: I mass edited all my comments to "[deleted]" and many of them got edited back within 2-3 days. There are some reasonable explanations about buggy caches, but that's a really convenient bug for Reddit right now.