Brand new dock plugged into brand new 16" MacBool Pro with Big Sur. I have two 32" Samsung monitors connected via hdmi cables (with the second using your supplied DisplayPort adapter).
If the computer goes to sleep, when I wake it up, the monitor plugged into HDMI blinks off for 2 seconds and on for 2 seconds and repeats forever. During this time nothing affects it. I’ve reseated cables, restarted the doc,
The only thing that works is a restart of the entire computer.