Next I tried to connect to their #5 server that was empty and connected just fine. Was able to move/shoot/etc., so I disconnected without issue.
Then I tried connecting to their #2 server with pop 10, and that also worked. However the game crashed as I was exiting and produced report ending with parker3:

I was able to reproduce just a few minutes ago trying to join their #4 server (https://codefourgaming.com/our-servers/)
population was at ~85/100 and game crashed. Produced report ending in parker2:

I have a crash report but missed where to submit the .zip...