Assigning values to QCborValueRef breaks if changing type

When assign a value to a QCborValueRef that has a different type as the value it is currently holding, a completely different value is assigned. This can happen when accessing a QCborMap or QCborArray via operator[]:

QCborMap testMap;
testMap[0] = QStringLiteral("value");
testMap[0] = 42;
qDebug() << testMap.value(0);  // returns "QCborValue(1)"

This does not happen when assigning a value of a different type to a QCborValue. It also works correctly if assigning a value of the same type.