Vision

Am I the only one who wants to know how they managed to bring Vision back to life? I know he is basically an android, but his AI is powered by one of the Infinity Stones, and they are basically atomized now.
And...If the infinity stones are gone, how is the universe managing to not suddenly fall into utter chaos? Weren't the stones supposed to somehow control the universe? That's what I got from The Ancient One's speech to Bruce in Endgame.