Tried to animate a background image like in the https://www.youtube.com/watch?v=YzaTuxpk5Cc video (animations - grocery store example):

<grid-layout id="background" scaleX="1.6" scaleY="1.6"></grid-layout>

    let background = page.getViewById("background");
    console.log("Starting...");
    background.animate({
      scale: { x: 11.0, y: 11.0 },
      duration: 2000
    }).then(function() {
      console.log("  DONE!");
    });

the animation finishes immediately and the console shows the DONE callback - so the animation was "successful", however it does nothing and it takes no time to finish ;)

This does only happen on android - ios animation working as expected.