When connecting to the relevant state changed signals for a StateMachine then when running via Valgrind there is an invalid read on exit

==3456== Invalid read of size 4
==3456==    at 0x3B5DEB872F: ??? (in /usr/lib/libQt5Qml.so.5.12.8)
==3456==    by 0x3B5E0AAE10: QQmlPropertyCache::~QQmlPropertyCache() (in /usr/lib/libQt5Qml.so.5.12.8)
==3456==    by 0x3B5E0AB1C8: QQmlPropertyCache::~QQmlPropertyCache() (in /usr/lib/libQt5Qml.so.5.12.8)
==3456==    by 0x3B5E084B84: QQmlMetaType::freeUnusedTypesAndCaches() (in /usr/lib/libQt5Qml.so.5.12.8)
==3456==    by 0x3B5E059571: QQmlEnginePrivate::~QQmlEnginePrivate() (in /usr/lib/libQt5Qml.so.5.12.8)
==3456==    by 0x3B5E059848: QQmlEnginePrivate::~QQmlEnginePrivate() (in /usr/lib/libQt5Qml.so.5.12.8)
==3456==    by 0x3B5CA8D10B: QObject::~QObject() (in /usr/lib/libQt5Core.so.5.12.8)
==3456==    by 0x3B5E05DB67: QQmlEngine::~QQmlEngine() (in /usr/lib/libQt5Qml.so.5.12.8)
==3456==    by 0x3B5E05DB88: QQmlEngine::~QQmlEngine() (in /usr/lib/libQt5Qml.so.5.12.8)

Component.onCompleted: {
                scxmlLoader.stateMachine[name + "Changed"].connect( (active) => {
                                                                                console.log("ACTIVE CHANGED FOR:", name, active)
                                                                           } )
            }