Crash related to QProperty bindings

class MyObject
{
public:
    virtual ~MyObject() = default;
    std::array<QProperty<QString>,2> a; // Note app does not crash when array contains only a single property (!??)
};

class MyObjectContainer : public MyObject
{
public:
    QProperty<int> count;
    std::vector<std::shared_ptr<MyObject>> lamellas;
    void add()
    {
        QScopedPropertyUpdateGroup g; // Commenting this line would produce slightly different crash.
        count = count + 1;
        lamellas.push_back(std::make_shared<MyObject>());
    }
};

QProperty<std::vector<std::shared_ptr<MyObject>>> objects;
QProperty<bool> p;

p.setBinding([&]() {
    // Dummy computation to demonstrate we work with related QProperties
    auto touch = [](MyObject& l) {
        for (auto &prop : l.a) {
            Q_UNUSED(prop.value())
        }
    };    
    // Iterate through objects
    for (auto l : objects.value()) {        
        // If the object is a container, iterate through its children
        if (auto arr = std::dynamic_pointer_cast<MyObjectContainer>(l)) {
            touch(*arr);
            for (int i = 0; i < arr->count.value(); i++) {
                auto l = arr->lamellas[i];
                touch(*l);
            }
        }
        else {
            touch(*l);
        }
    }    
    // Dummy return
    return true;
});

auto object = std::make_shared<MyObject>();
auto container = std::make_shared<MyObjectContainer>();

objects = { object, container };

// Following line crashes
container->add();