Accessing Print or File Menu causes top bar to become White and Black strips horizontally

[Bilton IT Dept]

As of 2 days ago, the users Nitro install started showing a white horizontal bar where the file menu was, and a black bar where the icons and menu items are below it. 
This perisists for a few seconds before accessing the File, or Print menu. 
Updated the Nitro Pro 13 to latest, issue still persists.  Version: (13.70.4.50)
Updated OS, UEFI Firmware, and checked for new drivers, or any windows updates, issue still persists. 

Prior to the update, the delay was from 30-45 seconds before the proper page would load. 

Any suggestions?

Edited May 16 by Bilton IT Dept
Adding details