Hello, @George,
1- I have checked your site URL and found no issue it is fine as you can see in this image: https://postimg.cc/NyGmygVT there is no issue.
2- In my previous reply I shared a CSS code with you below one:
.mobile-menu-popup .et-close-popup{z-index:999999999 !important;}
This code is to solve this issue and I checked your site you didn’t add this code please check my previous reply and fix it.
3- In order to solve your issue simply go to the Dashboard >> XStore >> Theme OPtions >> Theme Custom CSS >> Global and then paste the below code at the bottom of the CSS box there.
@media(max-width:575px){
.et-masonry-filters-list li{padding-bottom:20px !important; font-size:25px !important;}}
Then save settings and check back to your site after clearing the browser cache.
Regards 8Themes Team.