Android System [UID] 1000 Root Permission Request Is Android System [UID] in your list of SU Root Permissions?

I just reloaded the stock rom then installed SuperSU (otherwise blank system) 

Upon the next restart, one of the permission request that popped up is Android System [UID]. : system_user_1000

I don't remember seeing this before...


This is normal? Could this be malware?
It may due to Wanam Xposed 2.4.7. An XDA post states:


  the new Wanam Xposed v2.4.0 did Auto activate "Disable Knox notifications" when Knox Apps are installed. With 2.4.1 he Removed "Knox disabling at boot".