I troubleshoot it and found out that this is happening because of aggressive caching by SG Optimizer used on your site but I can’t clear or purge its cache as displayed in the attached screenshot.
So please contact the plugin developer or SiteGround Performance services to resolve it.
Hi, I wanted to update you that the problem was the Cloudflare cache. Even that cache emptied, everything is back in place. Thank you and sorry for the job I gave you.