Issues connecting with MacBook Pro 15 inch 2018 using Catalina + a temporary fix

[prdg.alex]

Originally Posted by m-kay

I'm having the same issue also with a MacBook Pro 15" 2018. When I just plug in the cable from my dock I get a flickering screen. Sometimes I can manage to make it work by restarting when the cable is plugged-in, but this does not work reliably.
Turning of the "Automatic Graphics Switching" unfortunately did not work for me. I can confirm that the adapter workaround is working but this is not really a solution for me.

I have also tried the new DisplayLink macOS app beta and get the exact same behavior.

Any idea from DisplayLink how we could get around this issue???

What kind of dock do you have?