https://docs.docker.com/engine/userguide/networking/default_network/container-communication/ might be of some use, beyond that, I"m not sure what else could be blocking it, but it’s something outside of Sonarr’s control.
https://docs.docker.com/engine/userguide/networking/default_network/container-communication/ might be of some use, beyond that, I"m not sure what else could be blocking it, but it’s something outside of Sonarr’s control.