JSON_SCHEMA_VALID is not validating case sensitive when using regex

11.1.0-dbg>SET @schema='{

    '>    "type": "string",

    '>    "pattern": "[A-Z]"

    '> }';

Query OK, 0 rows affected (0.000 sec)

11.1.0-dbg>

11.1.0-dbg>SELECT JSON_SCHEMA_VALID(@schema,'"a"');

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

| JSON_SCHEMA_VALID(@schema,'"a"') |

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

|                                1 |

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

1 row in set (0.000 sec)

11.1.0-dbg>SELECT JSON_SCHEMA_VALID(@schema,'"a"');

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

| JSON_SCHEMA_VALID(@schema,'"a"') |

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

|                                0 |

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

1 row in set (0.000 sec)