API Generate does not honor quote_char parameter

I can run this schema from the UI and have the quote_char returned in my response.

https://mockaroo.com/da5d9670

But when I use the generate.custom request my response does not contain the expected quote_char.

curl --request POST
–url ‘https://api.mockaroo.com/api/generate.custom?key=12345&count=10&quote_char=*&delimiter=%2C
–header ‘Content-Type: application/json’
–cookie ‘layer0_bucket=26; layer0_destination=default; layer0_environment_id_info=1680b086-a116-4dc7-a17d-9e6fdbb9f6d9’
–data ‘[
{
“name”: “LLC_BI__Account__c”,
“null_percentage”: 0,
“type”: “Regular Expression”,
“value”: “[:upper:]{2}\d{2}[:upper:]{2}\d{10}”,
“formula”: “”
}
]’

Is this a bug in the API or am I missing something in my request?