Updated to 11.2, now my ACD 30 goes black after 5 seconds

[winna]

Updated to 11.2, now my ACD 30" goes black after 5 seconds if choosing native 2560x1600 (was fine in 11.1). Sometimes I just hate Apple. I don't want to run the screen at 1280x800

 

[winna]

The macOS Big Sur 11.2 update addresses a list of problems, including Bluetooth reliability and an issue causing external displays to show a black screen on some Apple M1-powered Mac mini computers.

Yeah right!

 

[winna]

I reverted back to 11.1 and all is fine now

 

[winna]

Now the problem is that it left Safari version 14.0.3 that is only compatible with Big Sur 11.2....WHY??