Q_PROPERTY with using-declared enum cannot be compared in QML

class GradesClass
{
    Q_GADGET
public:
    enum GradesEnum { A = 0, B, C };
    Q_ENUM(GradesEnum)
    ...
};

using Grade = GradesClass::GradesEnum;

class Student : public QObject
{
    Q_OBJECT
public:
    ...
    Q_PROPERTY(Grade grade READ grade NOTIFY gradeChanged)
    Grade grade() { return m_grade; }
    ...
    Grade m_grade = Grade::B;
};

qRegisterMetaType<Grade>("Grade");
engine.rootContext()->setContextProperty("student", new Student());
qmlRegisterUncreatableType<GradesClass>("App.Grades", 1, 0, "Grades", "...");

import App.Grades 1.0

Window {
    visible: true
    Component.onCompleted: {
        console.log("student.grade:", student.grade)
        console.log("Enum value:", Grades.B)
        console.log("Equals enum val:", (student.grade === Grades.B))
        console.log("Equals int:", (student.grade === 1))
    }
}

qml: student.grade: B
qml: Enum value: 1
qml: Equals enum val: false
qml: Equals int: false

Q_PROPERTY(GradesClass::GradesEnum grade READ grade NOTIFY gradeChanged)

qml: student.grade: 1
qml: Enum value: 1
qml: Equals enum val: true
qml: Equals int: true