The issue you linked to is related to an SDK, not the API itself. Have you tried just directly streaming the response back without an SDK? For example we use fetch directly without any SDK for OpenAI in production with no issue
Whilst the bug is API-specific, there's no other way to report this, and that issue is the only place I've found anyone discussing this.
I contacted OpenAI support about it, waited several weeks, and just got a generic useless autoreply back.