React / Supabase Developer — Fix Simple Login & Session Bug (Next.js)

We have a small Next.js + React + Supabase web application that is already built. We need a developer to fix one simple issue before we continue development. Task : The login flow is working, but users are occasionally logged out after refreshing the page. We need someone to: Review the existing authentication flow. Fix the session persistence issue. Verify Supabase Auth is working correctly. Test the login/logout flow. Ensure there are no console errors after the fix. This is a very small debugging task. No new features are required. Tech Stack React Next.js TypeScript Supabase Auth JavaScript Vercel Requirements Experience with React and Next.js Experience using Supabase Authentication Comfortable debugging JavaScript/TypeScript applications Able to identify the root cause instead of applying temporary fixes Good communication Deliverables Fixed login/session issue Working authentication after page refresh Brief explanation of what caused the bug Clean, tested solution To Apply : Start your proposal with the word "SESSION" so I know you read the entire post. Then answer these two questions: Have you fixed Supabase authentication or session persistence issues before? How would you normally debug a login/session problem in a React application?