Laravel Auth Logout Not Working? Fixing Session Persistence Issues

As a senior developer, I've seen countless developers struggle with seemingly simple issues in authentication flows. The scenario you've described—where logging out seems successful but navigating back or manipulating the URL results in unexpected behavior (Case 1) that only resolves after clearing cache (Case 2)—is a classic symptom of session state management conflicts within an application.

This post will dive deep into why this happens in Laravel, analyze your provided code structure, and show you the robust way to handle authentication logout so that session persistence is handled correctly across requests.