imap_sieve to learn spam and ham not working

I see no errors in my logs or any evidence that anything at all is happening when moving items to/from my imap inbox/junk folders.

My configs are as follows

99-ispconfig-custom-config.conf

Code:

protocol imap {
  mail_plugins = $mail_plugins imap_sieve
}

plugin {
  sieve_plugins = sieve_imapsieve sieve_extprograms
  sieve_pipe_bin_dir = /etc/dovecot/sieve
  sieve_global_extensions = +vnd.dovecot.pipe +vnd.dovecot.environment
  sieve_execute_bin_dir = /etc/dovecot/sieve/bin

  # From elsewhere to Spam folder
  imapsieve_mailbox1_name = Junk
  imapsieve_mailbox1_causes = COPY
  imapsieve_mailbox1_before = file:/etc/dovecot/sieve/report-spam.sieve

  # From Spam folder to elsewhere
  imapsieve_mailbox2_name = *
  imapsieve_mailbox2_from = Junk
  imapsieve_mailbox2_causes = COPY
  imapsieve_mailbox2_before = file:/etc/dovecot/sieve/report-ham.sieve
}

/etc/dovecot/sieve/rspamd-learn-ham.sieve

Code:

require ["vnd.dovecot.pipe", "copy", "imapsieve", "environment", "variables"];
if environment :matches "imap.mailbox" "*" {
    set "mailbox" "${1}";
}

if string "${mailbox}" "Trash" {
    stop;
}

pipe :copy "rspamc" ["learn_ham"];

/etc/dovecot/sieve/rspamd-learn-spam.sieve

Code:

require ["vnd.dovecot.pipe", "copy", "imapsieve"];

pipe :copy "rspamc" ["learn_spam"];