WordPress: CiviCRM replaced Body Text box on Edit Post/Edit page screen

The last check on the CiviCRM Installer on WordPress was the version check for PHP. The hosting techies will update the php version later tonight, however until then no additional content can be posted to the public website.
See screenshot from the Edit Post window, happens also on the Edit Page screen.
Classification is minor, as one should check the PHP version and upgrade before starting the installer. but maybe it can be avoided that CiviCRM message bubble up to a core functionality like creating post and pages.