Does it happen to all users?
Have you tried File > Run >*ESC to disable customizations?
Try opening the panel in Customizer and right click the list box and go to the Options tab and look for blank values in any of the dropdown boxes.
Have you tried resetting the panel's size and position for the affected user?
EDIT:
Is it happening with application scaling set to default?
Is Windows' display scaling set to anything other than 100%
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David Speck II
Tennessee Software Solutions
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