share_with field in response after sharing has an extra @localhost attached to the username

[individual-it]

sharing a file with a user e.g. curl 'http://localhost:9140/ocs/v1.php/apps/files_sharing/api/v1/shares' -u user1:1234 --data 'shareType=0&shareWith=user0&path=%2Fhome%2Ftextfile.txt&permissions=1'
returns this a response with the share_with field having a @localhost postfix attached to the user-name. oC10 reports only the username

<?xml version="1.0" encoding="UTF-8"?>
<ocs>
   <meta>
      <status>ok</status>
      <statuscode>100</statuscode>
      <message>OK</message>
   </meta>
   <data>
      <id>10</id>
      <share_type>0</share_type>
      <uid_owner>user1</uid_owner>
      <displayname_owner>User One</displayname_owner>
      <permissions>1</permissions>
      <stime>1579672511</stime>
      <parent />
      <expiration />
      <token />
      <uid_file_owner>user1</uid_file_owner>
      <displayname_file_owner>User One</displayname_file_owner>
      <path>/home/textfile.txt</path>
      <item_type />
      <mimetype />
      <storage_id />
      <storage>0</storage>
      <item_source />
      <file_source />
      <file_parent />
      <file_target />
      <share_with>user0@localhost</share_with>
      <share_with_displayname>User Zero</share_with_displayname>
      <share_with_additional_info />
      <mail_send />
   </data>
</ocs>