Gltf three.js model jumping and resizing problem in mobile browser

Hi, I have a gltf 3D model on my html website and the model is rotating and fading out on scroll as it meant to be. The problem is in the mobile browsers where the model is jumping and resizing a little bit in the same moment as the browser address bar disappears on scroll. The 3D model is working excellent on desktop and even in mobile except the resizing and jumping. I searced for solutions on the web but without success. I will be happy for any working advice or solution. Thanks.