ListView section.property doesn't work when the model comes from C++

We have a ListView whose model is a QList<QObject*>, it works perfectly.

However, when we try to use the new section feature from ListView, setting section.property doesn't work : it can't find the property from our model. We have tried with section.property: "myProperty", section.property: "modelData.myProperty", etc...

If we use a ListModel, however, no problems