Mobile menu not expanding on chrome, works on safari

Hello, The mobile menu is suddenly not expanding when viewed on mobile, it has worked properly before.  On iOS, it displays correctly on safari on iPhone, but not chrome.  On iPad, it doesn’t display in mobile view for safari or chrome. website: www.eevisual.com  Theme is Clean Fotografie I suspect it’s a plugin or css? I can’t seem to find it on my own. Thank you for looking into this.