Symptom: When selecting entities, it may happen that the window frame is not displayed.

Possible cause: The Antialiasing - Mode option of your nVidia card is set to the Override any application setting value.

Solution:

• Make a right click in the Windows background and run the nVidia Control Panel application (on Windows 11, you may have to use the Display more options command to display the nVidia Control Panel application)
• From the 3D Settings > Manage 3D settings node, set the Antialiasing - Mode to the Application-controled value.