Option option -e does not work for me when I run it in my ubuntu docker.

It doesn't stop as it should.

Docker: ubuntu. tried version default ubuntu 1.5.0, but also manually installed lastest release 1.7.0, 1.7.1, debian/1.7.1-2):

However when I run on mac installed from brew it works as expected and stops properly:
% Auto-selecting Consumer mode (use -P or -C to override)
% Reached end of topic mytopic [0] at offset 696568219: exiting

Minimal example cli command to preproduce:
kafkacat -b kafkahost -o end -e -t mytopic | jq .Date

Your latest docker image works properly, but I can't use it as I dont want to deploy docker inside my docker.
docker run -it --network=host edenhill/kcat:1.7.1 -b kafkahost -o end -e -t mytopic
% Auto-selecting Consumer mode (use -P or -C to override)
% Reached end of topic mytopic [0] at offset 696569493: exiting