Hi,have you run QAbstractItemModelTester https://doc.qt.io/qt-6/qabstractitemmodeltester.html on the source model and the proxy model?
It usually quickly reveals issues in the overridden methods. Regards, Friedemann -- Friedemann Kleint The Qt Company GmbH _______________________________________________ Interest mailing list Interest@qt-project.org https://lists.qt-project.org/listinfo/interest
