well, I can't reproduce the real problem on codepen sadly, because there, seems works nicely, with everything though. My case after plenty of tests, is on the viewport width of 375px, the iPhone SE, idk if it is a problem due of the height, or the width of the viewport, if you can help me just to figured out, because the lack of my expertness in this situation, because besides of this scenario, the animation works perfectly, I noticed the problem just for the smallest viewport, in this case my iPhone 13 mini and if I put the iPhone SE in the developer tool of chrome. For you to understand the problem, I can make a screen recording, or I can share the link of my project. Thanks anyway for the great support, for me GSAP is the start point in my projects ❤️