Window border disappears

[Jan322265835kuo]

When I use Acrobat Reader the windowborder of my program disappears. 

   - When files are opened, but no file is selected, everything works fine.

   - When I'm reading a file, the windowborder of the program disappaers. 

See attachment

Acrobat Version: Continuous Release | Version 2023.003.20284 | 64-bit

[JR Boulay]

[MOVED TO THE ACROBAT READER DISCUSSIONS]