JSON with empty string is parsed as null since last releases

It seems some recent change has broken JSON parsing/quering.

SQL:

select json_value('""', '$')

started to return:

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

| json_value('""', '$') |

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

| NULL                  |

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

but I expect the following result instead:

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

| json_value('""', '$') |

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

|                       |

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

since version:

• 10.11.14
• 11.4.8
• 11.8.3
• 12.0.2

I belive this functional change is unintended as no other DB vendors behave like this.

Please confirm and fix.