OL-1228 — Proxy buffers streamed responses
What happened
The proxy buffers a streaming response instead of passing bytes through as they arrive: the CONNECT tunnel itself works, but a Server-Sent Events stream piles up behind the proxy's internal buffer and lands in one burst instead of streaming. This is a proxy-behaviour diagnosis, not a connectivity failure — the request still succeeds — so it is surfaced as a warning rather than failing the call. Look for a response-buffering or content-inspection setting on the proxy for the streaming endpoint.
What to do
Ask your network team to turn off response buffering or content inspection for the platform on the proxy, then run openlatch system proxy test.