Alias properties exposing objects from components have null propertyTypeId

For example, if the project has this component (also attached as file), the type of the alias property in it is not properly resolved:

import QtQuick
Rectangle {    
    property alias redRect: redRect

    width: 200
    height: 200

    Rectangle {
        id: redRect
        width: 100
        height: 100
        color: "#ff0000"
    }
} 

The redRect property in the above component gets null propertyTypeId in database, so is impossible to determine what the property type is at runtime.