And I noticed. Sentibubbler, SentiLadybug, SentiGabriel, SentiAlec, SentiNino. They were destroyed directly by Peacock Miraculous Holder. Their amok was never released by breaking some object. Exactly because they were real humans and worked like real humans

Why was ring able to control Adrien or Felix though? Because it's in human's nature to be exposed for manipulation or life control. So magic didn't prohibited from doing that

Part of being human, is that your life doesn't depent on some object, but on you. Your life style will determine how long will you live. Not breaking some ring. And magic adapted to that. Wild guess