Mandatory report format:
Bug description: Protected apps feature fails to lock app’s main service
Affected version: MK71.2-thea-201804202000-NIGHTLY.zip
Steps to replicate: System settings - Privacy- Protected apps
If you do not follow the format above when posting a bug report, it will delete or automatically be ignored. Without sufficient information, it is impossible for us to debug. Most probably the issue could be caused by your own inappropiate usage.