PostGIS Geometry Query returns "Error: Operation on mixed SRID geometries" only for certain values

I have PostGIS table with two geometry columns, both defined with SRID 4326. I can insert into the table without problem, using the following INSERT statement (where lng and lat are values passed in programmatically):

INSERT INTO pad_meta (
    uuid, created, updated, name, origin, radius, area, expiry, creator
) VALUES (
    $1, now(), now(), $2, ST_GeomFromText('POINT(lng, lat)', 4326), $3, 
    ST_Buffer(ST_GeomFromText('POINT(lng, lat)', 4326), $4), $5, $6
)

But when i query for an intersection using ST_Intersects, depending on the value of the point I get ERROR: Operation on mixed SRID geometries.

For example, this query works:

SELECT * FROM pad_meta where ST_Intersects(
    'POINT(-122.334172173172 46.602634395263560)'::geometry, area::geometry 
) ORDER BY created DESC;

And this errors out:

SELECT * FROM pad_meta where ST_Intersects(
    'POINT(-122.334172173172 47.602634395263560)'::geometry, area::geometry 
) ORDER BY created DESC;

Note, they are identical queries except the value of the longitude. I have experimented with different values, but not identified a clear transition point between the queries that work and don't.

I think I am fundamentally misunderstanding something. For the moment, I have solved/corrected/worked around the problem by re-formatting the query to use ST_GeomFromText and explicitly specifying the SRID:

SELECT * FROM pad_meta where ST_Intersects(
    ST_GeomFromText('POINT(-122.334172173172 47.602634395263560)', 4326), area
) ORDER BY created DESC;

But I honestly don't really understand what the difference is, or if this truly "the" solution.

Why am I getting an error only for specific values, and what is the proper way to format this query?

Here is my table definition for reference:

CREATE TABLE IF NOT EXISTS pad_meta (
  uuid CHAR(32),
  created TIMESTAMP,
  updated TIMESTAMP,
  name VARCHAR(128),
  origin GEOMETRY(Point, 4326),
  radius INTEGER,
  area GEOMETRY(Polygon, 4326),
  expiry TIMESTAMP,
  creator CHAR(32),

  PRIMARY KEY (uuid)
);

I have also verified that there is only one type of SRID in the geometry_columns:

SELECT f_table_name, f_geometry_column, srid FROM geometry_columns;
f_table_name | f_geometry_column | srid
--------------+-------------------+------
 pad_meta     | origin            | 4326
 pad_meta     | area              | 4326

I have also seen Why does only one of the following queries throw an error?, but since I am already explicitly defining my geometry SRIDs when inserting into the table, it seems like that is not what is happening.