Hi,
Unfortunately I wasn't able to configure your parallax sections properly - probably the problem is caused by too much content between your parallax areas.
I've tried also to configure default demo content with 3 parallax sections -
https://demo.gavick.com/wordpress/creative/and it's possible, but the animation from last (3rd) section is delayed (not enough animation is visible I think).
In this case you have 2 options:
- decrease amount of the content between parallax areas
- use only 2 parallax areas (remove the middle parallax from Mainbody widget area, because it's event not adjusted properly - it's not a full width like Header Top and Header Bottom areas), If I were you, I would choose this option.