About the api: "This is currently set at 600 requests per 10 minutes but this may change.". It creates many problems with daily running on production and you often meet this blockage. This limit is around since many years, maybe it's time for an upgrade and increase of it, to something more user-friendly?
Linked issues
Comments 10
I'm not sure where you found that chat, but I'm not sure it's official. You can send a request through this form for official support. 🙂
Is https://help.minecraft.net/hc/en-us/requests/new?ticket_form_id=360001225811 the same as well?
Your screenshot is the result of a Microsoft support link. The link mark gave you is Mojang Support.
This is working as designed, as mentioned in @unknown's comment on WEB-5825. Please create a support ticket, following the process described in the comment, if you require a higher limit. 🙂