proxy_protocol error

[jonisapp]

Describe the bug

When adding proxy_protocol directive in smtp, submission and imap, I get the following error : panic: runtime error: hash of unhashable type proxyprotocol.Listener

Configuration file

imap tls://0.0.0.0:993 tcp://0.0.0.0:143 {
    proxy_protocol
    auth &lldap_auth
    storage &local_mailboxes
}

• maddy version: 0.8.1