Postgres 12 - default value for text column

[Raj Gandhi <raj01gandhi@xxxxxxxxx>]

The following alter table with default set to very large text used to work in Postgres 10 but fails in Postgres 12 with ERROR:  row is too big: size 12960, maximum size 8160

create table test (id int);
alter table test1 add column license text DEFAULT   '<insert default text with size more than 8160 >'

The following two variants works in Postgres 12 without any error:

create table test (id int);

alter table test1 add column license text   
alter table test1 alter column license SET DEFAULT   '<insert default text with size more than 8160 >'  

create table test (id int, license text  DEFAULT   '<insert default text with size more than 8160 >' );

Thanks in advance.