When using the command ‘HighResShot 2’, I noticed that it had captured multiple screen shots, one of which was the main viewport and the others appeared as a grey room (possibly persona viewport).
I typically have persona open in the editor and launch in a separate viewport (full screen)
Please let me know if you require any further info.
This is currently a known and reported issue with the Command not functioning as intended. It is on the roadmap to get fixed within future versions of the engine. We appreciate you taking the time to report this issue, and let us know if you have any other questions or need additional assistance!