In about the last 24 hours, my endpoint for Server-Sent Events stopped behaving correctly. It seems that Cloudflare started buffering output and waiting until the end (browser received full buffered output after 5 minutes) - which is not valid for SSE endpoints. Has Cloudflare rolled out some update? Is there anything how can I fix this?
When I change DNS settings and connect directly to my web server, SSE works. I checked the audit log and nothing was changed in the settings.