Hello, @JP,
Your issue has been solved please check back to your site on mobile now after removing the mobile browser cache, It was “SiteGround Optimizer” plugin, which was creating this issue on your site, I just deactivated that plugin and it solved the issue, Please check this video: https://www.veed.io/view/7189af37-153b-407f-b609-2eda2e74c5ee/showcase?sharingWidget=true
If you want to use that plugin then you have to contact the plugin Author to fix this issue on your site.
Regards 8Themes Team.