I have noted situations in Solasta where you don't make those rolls and remain in stealth regardless (possibly because the attacker is too far, but I had situations early in the game where I did stealth attacks from 10-15 feet away and didn't roll and I couldn't come up with any real possible explanation for that). Given new nature of this rule, I've chalked it up to bugs and believe the rolls should be happening no matter what.
If you kill your target, it doesn't make you roll.
