- Plesk 12.5 for Linux
When a new subdomain is added via Plesk, a PHP handler on some subdomains gets changed to the handler of the main domain.
The current Plesk version is below 12.5.30 Update #51
This is a Plesk bug with ID PPPM-4973, which has already been fixed in Plesk 12.5 Update #51.
Update Plesk to the latest micro-update: