pg_dump No comment for policy

Severity: Low
PG Server: Versions 9.5 and 10.3
pg_dump: version 10.3

I have created a policy with a comment on it. pg_dump does not dump
the comment.

Here is my entire schema definition:
--------------------------------------------------------------------
create table rls (
  username text not null,
  details  text not null
);

create policy only_owner on rls
  for all
  to session_user
  using (username = user)
  with check (details != 'xyzzy');

comment on policy only_owner on public.rls is 'Another comment';
--------------------------------------------------------------------

pg_dump extracts the table and policy but not the comment.

I can manually extract the comment with a query:

select p.polname, 
       quote_literal(obj_description(p.oid, 'pg_policy')) as comment
from pg_catalog.pg_policy p;

Initially tried with postgres server 9.5.21 running from psql 10.3.
Also
tried with postgres server 10.3 running from psql 10.3.

I am not at all anxious for this to be fixed. Just thought you should
know.

__
Marc