@DUDU-Meng BBishop123 I downgraded, the update installed but when the head unit started, the launcher repeatedly refreshed. As if the "reload launcher" button was being pressed on repeat. And the air con controls didn't work at all, the navbar ones gave the message "a/c control not supported" and the same message popped up if I tried to open the air con app. So I downgraded back to 250951.