diff --git a/worklenz-backend/src/controllers/auth-controller.ts b/worklenz-backend/src/controllers/auth-controller.ts
index ef8c069a..292c7707 100644
--- a/worklenz-backend/src/controllers/auth-controller.ts
+++ b/worklenz-backend/src/controllers/auth-controller.ts
@@ -249,16 +249,20 @@ export default class AuthController extends WorklenzControllerBase {
           });
         }
         
-        // Regenerate session to prevent session fixation
+        // Regenerate session for security (prevent session fixation attacks)
+        // Store the old session ID for debugging
         const oldSessionId = req.sessionID;
+        
         req.session.regenerate((regenErr) => {
           if (regenErr) {
             console.log("Session regeneration error:", regenErr);
+            // Fall back to using existing session if regeneration fails
+            console.log("Falling back to existing session");
+          } else {
+            console.log("Session regenerated from:", oldSessionId, "to:", req.sessionID);
           }
           
-          console.log("Session regenerated from:", oldSessionId, "to:", req.sessionID);
-          
-          // Re-establish the user in the new session
+          // Re-establish the user in the session (new or existing)
           (req.session as any).passport = { user: { id: user.id } };
           
           console.log("=== LOGIN SUCCESSFUL ===");
@@ -284,29 +288,30 @@ export default class AuthController extends WorklenzControllerBase {
               });
             }
             
-            // Force the session cookie to be sent
+            // Get session cookie details
             const sessionName = process.env.SESSION_NAME || 'connect.sid';
-            const sessionCookie = req.sessionID;
             
             console.log("Session saved successfully");
             console.log("Session name:", sessionName);
-            console.log("Session ID to be sent:", sessionCookie);
+            console.log("Session ID to be sent:", req.sessionID);
             
-            // The session middleware should automatically set the cookie
-            // But let's check if it's being set
+            // Check if Set-Cookie header is being sent
             console.log("Response headers after save:", res.getHeaders());
             console.log("Set-Cookie header:", res.getHeader('set-cookie'));
             
+            // Return response with explicit instruction for mobile app
             return res.status(200).send({
               done: true,
               message: "Login successful",
               user,
               authenticated: true,
-              sessionId: req.sessionID, // Include for debugging
-              sessionCookie: sessionName // Include cookie name for debugging
+              sessionId: req.sessionID, // Mobile app should use this session ID
+              sessionCookie: sessionName, // Cookie name for mobile app
+              // Important: Mobile app must update its session cookie!
+              updateSessionRequired: oldSessionId !== req.sessionID
             });
           });
-        }); // Close regenerate callback
+        });
       }); // Close login callback
     })(req, res, next);
   }
diff --git a/worklenz-backend/src/routes/auth/index.ts b/worklenz-backend/src/routes/auth/index.ts
index 818e5f27..ab4570e7 100644
--- a/worklenz-backend/src/routes/auth/index.ts
+++ b/worklenz-backend/src/routes/auth/index.ts
@@ -22,6 +22,21 @@ authRouter.post("/login", passport.authenticate("local-login", options("login"))
 authRouter.post("/signup", signUpValidator, passwordValidator, passport.authenticate("local-signup", options("signup")));
 authRouter.post("/signup/check", signUpValidator, passwordValidator, safeControllerFunction(AuthController.status_check));
 authRouter.get("/verify", AuthController.verify);
+authRouter.get("/debug", (req, res) => {
+  console.log("=== DEBUG ENDPOINT ===");
+  console.log("Session ID:", req.sessionID);
+  console.log("All cookies:", req.cookies);
+  console.log("Cookie header:", req.headers.cookie);
+  console.log("Session data:", req.session);
+  console.log("Is authenticated:", req.isAuthenticated());
+  res.json({
+    sessionId: req.sessionID,
+    cookies: req.cookies,
+    cookieHeader: req.headers.cookie,
+    authenticated: req.isAuthenticated(),
+    session: req.session
+  });
+});
 authRouter.get("/check-password", safeControllerFunction(AuthController.checkPasswordStrength));
 
 authRouter.post("/reset-password", resetEmailValidator, safeControllerFunction(AuthController.reset_password));