Hey, I'm having the same issue. All TweenMax calls are ignored since v12 (using 12.1.4) on iOS. Everything is ok on Android and desktops.   I've just debug it and not a single error is thrown. I see that Animation._updateRoot is called every frame in scout. But nothing is rendering and no complete events are fired.   If I replace greensock package with version 11, it just works.