Repro:
Using replica set from https://github.com/mongodb-js/devtools-docker-test-envs#replicaset

• Note: do not add the replica set hosts to /etc/hosts so they do not resolve.
  In Compass then connect with connection string:

  mongodb://root:password123@localhost:28003/?authSource=admin&readPreference=secondary&appname=MongoDB%20Compass%20Isolated%20Edition&ssl=false