I have both of these docks.
The OWC is my primary dock, but I did try the CalDigit one for a bit (both TB3.) Why? Same problem you're having - the monitors would never wake from sleep.
At the time I was using a Dell P2415Q with macOS and this monitor would just refuse to wake up from sleep or when I swapped laptops on the dock. It "just worked" far less than half of the time. I would have to hard power cycle by unplugging the monitor power cable - power button recycle was rarely sufficient.
I could never find a fix for this, but after a lot of searching I was led to believe that it was a problem with EDID and macOS with this particular monitor. I never confirmed this though.
The problem was almost entirely fixed with the latest macOS Big Sur update. I have to power cycle the monitor only a couple times a month now. Huge difference, and seems to be the case with both docks.