Good news is that notebookcheck measured over 500 nits on their model (been hunting for this for like a week now) - which means this doesn’t affect every model. But if you’re is affected, this might mean a faulty display rather than a software glitch?
https://www.notebookcheck.net/Just-...6-with-Core-i9-Radeon-Pro-5500M.443889.0.html
https://www.notebookcheck.net/Just-...6-with-Core-i9-Radeon-Pro-5500M.443889.0.html