In prototype mode scroll bar animation is not responding

Hi everyone, I’m working on a scroll triggered animation for a landing page, where the frame (containing video) in the hero section increases in size and takes up entire space when the scroll bar is dragged. While i was practicing this animation it worked, but when i added this ‘hero section’ frame in my main ‘landing page’ frame and then checked in prototyping mode, the scroll bar does not respond.

Can anyone help with this ?
Thanks!
Dilyse.