I'm not entirely sure I understand your issue, but when it comes to the modal, you may want to consider utilizing the normalScrollElements
option in fullpage.js or disabling scrolling altogether by using
fullpage_api.setAllowScrolling(false)
.
Additionally, make sure any fixed elements are positioned outside of the fullPage.js wrapper. There have been reported issues with certain browsers and 3D CSS transforms.
If moving the element isn't possible, you can explore using the fixedElements
option or opting for non-3D transformations by enabling scrollBar:true
or css3: false
.
To learn more about these options and methods, check out the documentation on the fullpage.js website