Same issues as everyone else with a max spec 16-inch 2019 MBP running 12.4. Everything worked great before upgrading to Monterey. I have two Dell monitors connected with usb-c -> displayport cables, but when I plug in a 3rd screen via usb-c -> HDMI, the screen often freezes and then reboots after 120s. I have tried all different combinations of monitors plugged in directly to the macbook and two different docks. I was able to stop it instantly freezing when plugging in the 3rd screen by changing the Macbook's display refresh rate from 60hz to 59hz, even though I'm using the macbook with the lid closed, but I still get freezes when doing things like moving a window from one monitor to the 3rd screen.
How do we actually get Apple's attention on this?