Problem with enum class from namespace used as QObject property

It seems that the enum class property works differently if the enum type was instatied in namespace or in QObject.

I haved created two analogous enums and the comparison in QML don't work if i use enum class that was declarated in namespace (with Q_NAMESPACE and Q_ENUM_NS) (see the attached application).

Additionally, if I remove Q_DECLARE_METATYPE(model::UserType) from ModelEnums.h i get the error: QMetaProperty::read: Unable to handle unregistered datatype 'model::UserType' for property 'User::userType' but in the documentation of Q_ENUM_NS i can read: 

"Registered enumerations are automatically registered also to the Qt meta type system, making them known to QMetaType without the need to use Q_DECLARE_METATYPE()."