Oh, yeah, thank you. We were using wrong syntax for specifying multiple queues.
See:
- Bug #35898: Wrong syntax used in docker-compose.yml for specifying queues - Foreman
- Fixes #35898 - Correct syntax for multiple queues by adamruzicka · Pull Request #9572 · theforeman/foreman · GitHub
It would be great if you could check the PR out and leave a comment there if it does the trick for you