Default privileges Don't work when owner changes

One of the first things you learn in postgres is the importance of getting the default privileges configured. Coming from the SQLserver background, I found having to assign default privileges a little precarious but once I got over that hump it has become more obvious for its place in PG. 

The other day I discovered that default privileges don't get inherited of the new owner when the ownership changes of an object.

1.) login as postgres 

create table tab(id int) 

2.) login as d_owner 

create table taba(id int)

3.) Grant permission for readonly role access data from the public schema owned by d_owner
grant select on all tables in schema public to readrole;

alter default privileges for user  d_owner   in schema public grant select on tables to feedsapi_readonly_role

4.) Change the owner of tab from postgres to d_owner

      Alter table tab owner d_owner 

5.) login as readrole
     select 1 from tab;  --> can access 

      select 1 from taba;  --> permission issue 

6.)  Login as  d_owner  

      create table tabb(id int)

    

7.)   login as readrole   

        select 1 from tabb;  --> can access   

8.)  Login as  d_owner   

       grant select on all tables in schema public to readrole;

9.)  login as readrole   

     select 1 from taba;  -->  can access