Im also having the same issue with my site! http://grandeurproperty.co.uk/stay/home
Now,I know this code is effecting it...
@media screen and (max-width:767px) {
html, body {
overflow-x: hidden;
}
}
However, I have needed to add this to the site in order for my mobile nav to fit on mobiles correctly. It just stopped working properly yesterday, so the above code was a fix.
If I could stop scroll on mobile menu this would be the final hurdle!