Kinda dumb of me to not have reported the way to get softlocked in that message, but what's done is done I guess.
I remember clearly one of them: I got to 7/7 sins and instead of dying the game just stopped doing anything (like animations and sound were still playing, but I was literally softlocked and nothing was going on). It might have been a combination of two events (like getting 7/7 sins AND killing an enemy) I guess? Sorry if not helpful but that's all I can remember now. I will maybe play the game again and will see if I can get softlocked again, will tell you if I get it