There are a few things that could be causing this issue. One possibility is that there is a caching plugin installed on your website that is causing the issue. Another possibility is that there is a problem with the browser you are using to access the website.
Try accessing your website on a different browser or device to see if that resolves the issue. If the problem persists, deactivate all of your plugins and then reactivate them one by one to see if that resolves the issue. If none of these options work, it may be best to contact your hosting provider or website developer for further assistance.
Did you recently change DNS of your website?