There is a discrepancy in the use of "--initial-registration" command-line option to the node in the docker container regarding the Corda version. This affects nodes connected to a compatibility zone in Docker.
Steps to reproduce:
1. Pull official docker container. e.g.: corda/corda-zulu-4.3-rc01
2. Register a node connected to a Compatibility Zone in Docker.
No errors/warnings are expected. Registration process run uses the “initial-registration”
The warning appeared in the console during the node registration process: