Derived table truncates HEX(CAST(ABS(bit_literal) AS BINARY)) result from 3432 to 34

SELECT

  HEX(CAST(ABS(b'101010') AS BINARY)) AS direct,

  (

    SELECT x

    FROM (

      SELECT HEX(CAST(ABS(b'101010') AS BINARY)) AS x

    ) q

  ) AS derived;

+--------+---------+

| direct | derived |

+--------+---------+

| 3432   | 34      |

+--------+---------+

1 row in set (0.001 sec)

The same deterministic expression returns different results depending on whether it is evaluated directly or through a derived table.
HEX(CAST(ABS(b'101010') AS BINARY)) evaluates to 3432 directly, but the same expression is truncated to 34 when passed through a derived table.

This appears to be a wrong-result issue caused by incorrect expression length/type metadata propagation in the derived-table path.