api 2.0 refs/tags sort by created_on causes 500 error

Hello,

I get 500 internal server error when I try to sort tags result by created_on.
However I don't get internal server error when I don't include it.

Problem with:
https://api.bitbucket.org/2.0/repositories/appsaloon/mr-wc-integrator-plugin/refs/tags?sort=-created_on

No problem with:
https://api.bitbucket.org/2.0/repositories/appsaloon/mr-wc-integrator-plugin/refs/tags

{"error": {"message": "Internal server error", "id": "9e2f0f45d48141c0a8c08870df9b4cff"}}

Take care,

Aytaç