We are aware of an issue in the Studio Editor with global sections being overlapped by another section with sticky position type, which is caused by a matter on Safari browser’s side.
As a result, the section with sticky position remains at the front and the global section scrolls behind it.
As a workaround, please proceed with the following steps:
Click the section with Sticky position.
Change its position type to Default.

This article is credited to the Wix team - https://support.wix.com/ and we thank them for that!