Vulkan viewport error when multisampling is enabled

I have downloaded the "Scene Graph - Custom QSGRenderNode" example from "https://doc.qt.io/qt-6/qtquick-scenegraph-customrendernode-example.html". Then I added this lines to the start of main function:

QSurfaceFormat fmt = QSurfaceFormat::defaultFormat();
fmt.setSamples(8);
QSurfaceFormat::setDefaultFormat(fmt);

QQuickWindow::setGraphicsApi(QSGRendererInterface::Vulkan);

Then I saw that the triangles of the CustomRenderNode node were being rendered in the wrong place. This problem only occurs when using Vulkan.