- Plesk Onyx for Linux
Changing PHP versions resets "served as" drop down menu in Domains > example.com > PHP Settings.
e.i: if PHP version is set to 7.3 run PHP as FPM Application served by nginx and the version is changed to PHP 7.2, the drop down menu for FPM Application served by nginx gets reset to FPM Application served by Apache.
This is bug with ID PPPM-10694 which will be fixed in future updates.
Currently, there is no workaround possible.