Designer Security Inheritance Behavior or Bug

I have a two folders one containing constants and another containing expressions where objects in each folder when viewing security are marked for inherit from parent which shows this configuration, please note the default (all other users) permission level is Viewer.

If I edit the security for the parent folder it shows that default has no access.


Is this expected behavior or have I found a bug?

Worth noting is that the inherit from parent was off and was toggled back on during life of this specific object.   However even if I uncheck inherit from parent, set default to no access,  apply the changes (save object and close) then change security of object again to turn back on inherit from parent it keeps setting the default to "Viewer" rights.    

The version of appian is 19.2

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