Lovable Supabase Auth Session Missing After Refresh
Quick Answer
The Lovable auth flow is not restoring the Supabase session correctly on app load, or the redirect URLs and auth environment variables do not match the deployed domain. Start with "Verify the Supabase URL, anon key, and redirect URLs" before making broader code changes.
You're in the right place if...
- !User signs in successfully, then gets logged out on refresh
- !Protected pages bounce back to login
- !Auth works in preview but fails on the deployed site
Why this happens
The Lovable auth flow is not restoring the Supabase session correctly on app load, or the redirect URLs and auth environment variables do not match the deployed domain.
Fix
Verify the Supabase URL, anon key, and redirect URLs
Check the deployed environment variables and make sure Supabase Authentication -> URL Configuration includes the exact production domain and callback paths.
Make the app restore auth state on boot
Use this prompt to make Lovable restore the session before rendering protected routes.
Copy this prompt
The Supabase session is missing after refresh. Please update the auth flow so the app restores the existing session on load, waits for auth initialization before rendering protected pages, and redirects only after the auth state is known.
Test the full login flow on the live domain
Sign in on the deployed URL, refresh a protected page, and confirm the session still exists. If it fails only in production, the redirect URLs or env vars are still wrong.
Prevent this next time
Treat auth as a production flow, not just a preview flow. Always test sign-in, refresh, and sign-out on the deployed domain before launch.
Frequently Asked Questions
Production usually introduces mismatched callback URLs or missing environment variables that are hidden in local or preview environments.
No. Wait for Supabase to finish restoring the session first, or you create false logout loops.
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