There are more warnings to ignore with Qt 6.9.1.

• [warning] QObject::disconnect: wildcard call disconnects from destroyed signal of QTcpSocket::unnamed
• [warning] This plugin supports grabbing the mouse only for popup windows
• [warning] Creating a popup with a parent, QWidgetWindow(0x1ab0fd00, name="MainWindowWindow") which does not match the current topmost grabbing popup, QWidgetWindow(0x1b40bf90, name="QMenuClassWindow") With some shell surface protocols, this is not allowed. The wayland QPA plugin is currently handling it by setting the parent to the topmost grabbing popup. Note, however, that this may cause positioning errors and popups closing unxpectedly. Please fix the transient parent of the popup.