- Plesk Onyx for Linux
- Website preview in Plesk > Domains > example.com > Preview gets redirected from http://203.0.113.2/plesk-site-preview/example.com/203.0.113.2/ to https://example.com
- .htaccess file does not contain any redirection rules
- Permanent SEO-safe 301 redirect from HTTP to HTTPS option is disabled in Plesk > Domains > example.com > Hosting Settings.
Redirection is performed inside WordPress.
Disable redirection in Wordpress. Check WordPress plugins like "Redirection" on the WordPress instance of the affected domain.