Possible wrong result with some "in" subquery with non-existing columns

Dear All,

This is a common scenario in below query.  I just verified in the pg14.x.

mydb=# create table test1(id1 int primary key, col2 varchar(32));
CREATE TABLE
mydb=# create table test2(id2 int primary key, col2 varchar(32));
CREATE TABLE
mydb=# insert into test1 values(1, 'wang');
INSERT 0 1
mydb=# insert into test2 values(2, 'tttt');
INSERT 0 1
mydb=# select * from test1 where id1 in (select id1 from test2 where id2 = 2);
 id1 | col2
-----+------
   1 | wang
(1 row)

mydb=# insert into test1 values(3, 'wang');
INSERT 0 1
mydb=# select * from test1 where id1 in (select id1 from test2 where id2 = 2);
 id1 | col2
-----+------
   1 | wang
   3 | wang
(2 rows)

In the above query:  id1 is not a column of table test2.
Should not we expect this should be en error instead of it thinking it's a column from the table : test1?

Regards,
Xiong