Solve bug on iphone 7 and under, in portrait mode of my website: prixmarcelduchamp.com

The project is to solve 2 front end bugs for mobile/tactile ios devices without causing new bugs. Developer will have to install code on their own online server and their new code as second website so I can check the fixes before using their code and see difference between now and before. Here the bugs: [login to view URL] on iphone 7 and under, in portrait mode of my website: prixmarcelduchamp.com. (see video attached) On any other smartphone behavior is correct when click on artist name (should show bubble and blinking numbers on each side of the name. :[login to view URL] [login to view URL] iphone 7 and under prevent page from scrolling, only columns should scroll