🚨 Realtime Broadcast Issue: Works Locally, Buffered in Production
Setup:
- Frontend: Next.js on Vercel
- Backend: Node.js API on Railway
- Supabase: Realtime broadcasts for progress updates
- Use case: Broadcasting compliance check progress (10% → 30% → 60% → 90% → 100%)
Problem:
Broadcasts are being buffered and delivered all at once in staging (which will be same issue on prod once release), but work perfectly in local development.
What Works
:
- Local development: Progress updates arrive in real-time (10%, 30%, 60%, etc.)
- WebSocket connection establishes successfully in both environments
- All broadcasts eventually arrive (just buffered in production)
What Doesn't Work
:
Staging: All broadcasts arrive at the same time at the end
Progress bar jumps from 0% to 100% instantly
WebSocket frames show all updates arriving within 42ms of each other
What I Tried:
- Run Staging env locally both backend and frontend and it works as expected however when i tried it on the deployed staging frontend and backend it wasn't working.
- Added all the necessary configs, enabled broadcast realtime, added RLS in realtime.messages
- Frontend: Next.js on Vercel
- Backend: Node.js API on Railway
- Supabase: Realtime broadcasts for progress updates
- Use case: Broadcasting compliance check progress (10% → 30% → 60% → 90% → 100%)
Problem:
Broadcasts are being buffered and delivered all at once in staging (which will be same issue on prod once release), but work perfectly in local development.
What Works
:- Local development: Progress updates arrive in real-time (10%, 30%, 60%, etc.)
- WebSocket connection establishes successfully in both environments
- All broadcasts eventually arrive (just buffered in production)
What Doesn't Work
:Staging: All broadcasts arrive at the same time at the end
Progress bar jumps from 0% to 100% instantly
WebSocket frames show all updates arriving within 42ms of each other
What I Tried:
- Run Staging env locally both backend and frontend and it works as expected however when i tried it on the deployed staging frontend and backend it wasn't working.
- Added all the necessary configs, enabled broadcast realtime, added RLS in realtime.messages
