Restricted mode does not restrict access to key features for additional administrators in Plesk

Symptoms

• The "Restricted mode" does not restrict access to key features and additional administrators can access to:
  Server Settings
  Extensions
  Updates / Update Settings
  License information
• Other features might also be available for additional administrator accounts. 

Cause

Such behavior is confirmed as the Plesk bug with ID: #PPPM-14471

Resolution

Fixed in 18.0.62. Consider updating the Plesk server.