I couldn't figure out what commands is executing: journalctl -u sshd. Levels 1, 2 and 3 are played in this neighborhood. Also, you took the time to write this issue; perhaps you can take the next step and submit documentation or code that addresses problems? Therefore there was no clue given from the debug logs of what goes inside of the "black box". Would be nice to log the progress when downloading a base image in the FROM command.
nest...