Hi Thomas, This is because the app_container_tag is unique under each resource. Given your two brokers are on separate resources BROKER0 and BROKER1, they get identical (1) container_tag.
You should set them in the same resource (BROKER), and the numbering will be sequential. No idea how it behaves on container restart, however this is good enough to start and flex a kafka cluster here. I've sent your a pull request on github showing how I did. There's no pretention for actual merge, but if you want it, I can amend for inclusion to your leasure. Kind regards, JB
