Animations effect messing with layout

Problem is on Android devices. When for example Android xperia opens with google chrome on mobile it loads page with full width but when i scroll down and animations starts its making whole website narrow than screen device width until i click on some photos on page and after that layout comes normal like nothing happened. Would that be problem with theme or plugin. I think its maybe something about time of loading scripts…any help?

The page I need help with: [log in to see the link]