Originally Posted by
pschlute
This may or may not be relevant, but there is a chance it is. I use an Eizo monitor and the advice on their website is not to update to windows 11 yet, as they state there is a bug in it (win11) which prevents the monitor profile being correctly read by the Eizo calibration software.
Perhaps this "bug" is causing your issues (although why ACR and PS should not be identically affected I cannot explain).
I would suggest you post on some win11 forums and see what you find out.