Incorrect data type handling in JSON_TABLE

Assuming this JSON

{"upd_fields": [{"path": "$.path1", "rbac": 10, "is_strict": true}, {"path": "$.path2", "rbac": 8}]}

A JSON_TABLE like this

JSON_TABLE (

                t.json,

                '$.upd_fields[*]' COLUMNS (

                    field_path VARCHAR(30) PATH '$.path',

                    field_rbac BIT (16) PATH '$.rbac' NULL ON EMPTY,

                    field_strict BOOLEAN PATH '$.is_strict' DEFAULT FALSE ON EMPTY

                )

) jt

will output incortect values in field_rbac, while the values become correct if using TINYINT UNSIGNED.
The table is in a from clause after another table t containing json column.

We also had to switch the last field to boolean as an enum rappresenting the mode generated this error:
(conn:48282, no: 1064, SQLState: 42000) You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'ENUM('value1', 'value2', 'value3') PATH '$.enum' DEFAULT NULL ON EMPT