PostgreSQL issue where constraint function is not being called as view owner

weird.sql

begin;

-- Load in uuid-ossp extension for uuid_generate_v1mc
create schema "uuid-ossp";
create extension "uuid-ossp" with schema "uuid-ossp";

-- Create roles
create role alice;
create role bob;

-- Create data tables
create table foo(
	id uuid primary key default "uuid-ossp".uuid_generate_v1mc(),
	things jsonb not null
);
grant select,insert,update,delete on table foo to alice;
create table bar(
	id uuid primary key default "uuid-ossp".uuid_generate_v1mc(),
	foo uuid not null references foo(id) on delete cascade,
	name text not null
);
grant select,insert,update,delete on table bar to alice;
create function relevant_thing(bar) returns jsonb
	language sql
	as $$
		select things->$1.name from foo where foo.id=$1.foo;
	$$;
create function thing_exists_in_foo() returns trigger
	language plpgsql
	as $$
	begin
		if relevant_thing(new) is null then
			raise exception $fmt$thing '%' does not exist in foo$fmt$, new.name;
		end if;
		return new;
	end
	$$;
create constraint trigger exists_in_foo
	after insert or update of foo,name on bar
	for each row
	execute procedure thing_exists_in_foo();

-- Create documented views for public users
create view fooview as select * from foo;
grant select, insert(things) on table fooview to bob;
alter view fooview owner to alice;
create view barview as select * from bar;
grant select, insert(foo, name) on table barview to bob;
alter view barview owner to alice;

-- Demonstrate issue
set role bob;
with new_foo as (
	insert into fooview(things)
		values ('{"mybar":{}}'::jsonb)
		returning id
)
insert into barview(foo, name)
	select new_foo.id, 'mybar' from new_foo;
-- Fails with:
-- ERROR:  permission denied for table foo
-- CONTEXT:  SQL function "relevant_thing" statement 1
-- PL/pgSQL function thing_exists_in_foo() line 3 at IF

rollback;