Cloudflare buffering SSE streams

Our SSE was working fine hosted elsewhere, but when we merged the code into our server hosted on Cloudflare all the responses are being buffered and no longer streamed. We’ve tried adding both a cache rule and a page rule to bypass the route but neither worked. Turning on developer mode did nothing as well so it’s clearly not a caching issue as others have stated with similar problems.

Is there anyway to maintain Cloudflare’s proxy and not buffer every response? Creating a separate subdomain for one endpoint is unfortunately not an option for us.

Thank you in advance.