Valgrind reports QOpenGLWidget / QOpenGLContext memory leaks

We have a team investigating memory issues in our display applications.   One thread of investigation is looking into memory leak in QOpenGL module classes.  The team has  created a sample program where QOpenGLWidget instances are created with a parent widget (this is key) and then the instances and parent are destroyed.   The memory footprint is reported before and after the creation of the QOpenGLWIdget instances.  There is another sample program in which QOpenGLContext instances are constructed and the create() method called.  Then the instances are destroyed.  The memory footprint is reported before and after the creation of the contexts.   There appears to be leaked memory in both test cases.   Are we missing something obvious or is there lost OpenGL resources or other memory lost somewhere?

I have run this on various version of Qt 5 and Qt 6 as reported in affected versions.

QOpenGLWidgetLeaks-main.zip