Rate limiting for challenge creation is not clearly documented

Hi, I'm basically trying to get my bot to play as many games as the rate limiting allows. All I've seen in the docs is:

All requests are rate limited using various strategies, to ensure the API remains responsive for everyone. Only make one request at a time. If you receive an HTTP response with a 429 status, please wait a full minute before resuming API usage.

So when I encounter a 429 for challenge creation I backoff for 2 mins, but then I still get 429 responses for hours afterwards when making a request at 2 min intervals. The docs indicate I'm backing off for a sufficient amount of time but clearly I'm not. What duration is being used to measure the request rate?

Worth noting I'm continuing to have the event stream held open in parallel while making challenges, would this be causing continuous 429 responses?

Start by reviewing the API documentation covering challenge creation, HTTP 429 responses, and the event stream. Verify the rate-measurement window, retry guidance, and whether an open event stream affects challenge requests; the documentation is done when these behaviors and limits are stated clearly.