Small query yields "error: no relation entry for relid 11"

This small query results in "error: no relation entry for relid 11" in
Postgres 12 and 13 (beta) on db-fiddle.com.  It runs fine in Posgres
11.

Tom


SELECT 0
      FROM
      (SELECT 0) as "T1"
      LEFT OUTER JOIN
      (SELECT * FROM (SELECT *
        FROM
        (SELECT
         0) as "T1"
        LEFT OUTER JOIN
        (SELECT
         TRUE as "r") as "T2"
        ON
        TRUE) as "T1",
       LATERAL
       (SELECT
        TRUE as "b"
        UNION ALL
        SELECT
        CASE WHEN "r" THEN TRUE ELSE TRUE END as "b") as "T2"
        ) as "T2"
      ON
      "b"