sieve_after seems to not bring any effect to life in dovecot 2.3.13 dovecot-pigeonhole-0.5.13

[Bug Report]

dovecot 2.3.13 (89f716dc2)

dovecot-pigeonhole-0.5.13

OS: FreeBSD amd64 12.2-RELEASE 

After following code

------

require ["copy"];

# rule:[redirect]

if true

{

    redirect :copy "mail at mail.com";

    keep;

}

------

(both with keep and without keep) is executed sieve_after seems to not execute at all. 

Same code together with sieve_after was working as supposed in earlier versions.