Mobile menu doesn't work on ios

Hi guys,

I have developed the following website:
Preview link: Webflow - IR-GROUP

Everything looks fine on the preview and Android devices, but there are some issues on iPhone. The website occasionally stops working on Safari and doesn’t work at all on Chrome. The strange thing is that it sometimes works on iPhone 7 but doesn’t work on iPhone XS Max.

I’ve spent the whole day trying to fix it, even rebuilding the menu from scratch, and it’s driving me crazy. Can someone please help me out?

Thank you in advance

Here is my site Read-Only: LINK
(how to share your site Read-Only link)