Unable to access TCP localhost through onionmasq interface in a local chutney environment

Running onionmasq in a local chutney environment using the configuration found in the README makes it impossible to access hosts on the localhost. In other words: curl --interface onion0 http://127.0.0.1:80 times out, whereas curl --socks5-hostname 127.0.0.1:9150 http://127.0.0.1:80 succeeds with a running arti using the same configuration.

This issue may sound more of an academic nature but is crucial for testing.