SSE / Event Streaming wont work behind Cloudflare Proxy

Tools: NextJS 14, Coolify I have an API event that does event streaming using ReadableStream. It works perfectly locally and when I access it directly without Cloudflare Proxy. But when it's hidden behind Cloudflare, it doesn't return a response or events. I already spent 6 hours solving this issue and can't seem to figure out anything right. What I tried so far: - Bypass Caching using Cache Rule - Added Page Rule that bypass caching - Turn off Proxy via DNS - Override Response Headers to attach 'Transfer-Encoding': 'chunked', (Cloudflare seems to remove this IDK why) But this doesn't work either. API Endpoint code: const stream = new ReadableStream({ async start(controller) { try { await sendStreamMessage(controller, 'progress', { ...eventData }); return new NextResponse(stream, { headers: { 'Content-Type': 'text/event-stream', 'Cache-Control': 'no-cache', Connection: 'keep-alive', 'Transfer-Encoding': 'chunked', }, }); If anyone from the Cloudflare team can guide me that would be great. :NotLikeThis: