That's a great point actually -- since one thing I kinda wanted to get across with the multiple endings of this is that all of these endings may truly have happened in canon and we just didn't see them. Similar to like, the game overs you can get in the main game -- it was a path that was taken that ultimately ended up in Iggy dying so it reset, and probably there are 100s of these paths that we just don't see because it would be too ridiculous and boring to write/play them all LMAO And perhaps some of those different paths were a result of choices the other characters made, not just Iggy. I JUST THINK THAT'S A COOL THING TO THINK ABOUT.
I don't go into it too much, but my idea was mostly that they just gradually remember more and more with each loop. That's why they have the most "weirded out" deja vu moments in Arc 4 since they've done it many times by this point.