Bigint values are converted to string in JSON

[JohnyL]

I have window function which uses ROW_NUMBER. It returns bigint, but postgres.js converts it into a string. However, id field, which is int, is, in fact, a number in JSON:

SELECT row_number() over (order by id) * 100 as row_num,
       id
FROM clients.client;

PostgreSQL shows that row_num is bigint and id is int:

If I explicitly convert to int, then all goes fine:

SELECT (row_number() over (order by id) * 100) :: int as row_num,
       id
FROM clients.client;