iOS issue with the menu

Hello,

We are creating a website based on the Hashone theme.
But now that we are almost done, and testing the whole thing, we face several iOS bugs:

1/ the Portfolio images are not clickable on the homepage, no effect at all when you click on them (iPad), whereas it’s perfectly working on Android devices, and desktop computer. Same issue even with the demo.

2/ the main menu is working on the homepage, but as soon as we go on an page, the same menu opens but doesn’t link anymore to the pages (iPad) whereas even on an Android device it’s working perfectly.

What can we do for these 2 major issues?

Best regards,

vincent