I tried that and many other things like changing the default color profile and it and it didn't work. A reboot fixes it for a few days before returning, so it definitely seems like a bug rather than a hardware issue. Both my work MBP (No issues, macos 15) and personal Air (macos26) are apple silicon.

Dang, it worked for me, but my monitor is a 4K BenQ not a Studio Display, must be something else with those then.