I have the same problem with my MacBook Air M1, my BenQ XL2411P monitor worked perfectly with my usb-c hub connected to HDMI on Big Sur OS, after this Monterey 12.0.1 update it keeps blinking showing that it is connected and soon after 5 seconds it disconnects

Problem still persists, the monitor appears in the screen settings after 8 seconds, says it was disconnected. I believe that Apple developers should only use iMac to not solve this problem of hubs for external monitors, if they used that and were with the same problem it would come out in the first fix. Problem still persists in 12.1 beta 4 (21C5045a)

Problem still persists, the monitor appears in the screen settings after 8 seconds, says it was disconnected. I believe that Apple developers should only use iMac to not solve this problem of hubs for external monitors, if they used that and were with the same problem it would come out in the first fix. Problem still persists in 12.1 beta 4 (21C5045a)