diff --git a/backend/app/main.py b/backend/app/main.py
index 487343c..eae0f69 100755
--- a/backend/app/main.py
+++ b/backend/app/main.py
@@ -238,10 +238,20 @@ async def websocket_analyze(websocket: WebSocket):
     except WebSocketDisconnect:
         logger.info(f"[MAIN] Client {client_id} disconnected")
         manager.disconnect(client_id)
+    except RuntimeError as e:
+        # Client disconnected mid-analysis (e.g. navigated away before result arrived)
+        if "not connected" in str(e).lower() or "websocket" in str(e).lower():
+            logger.info(f"[MAIN] Client {client_id} disconnected before result was sent")
+        else:
+            logger.error(f"[MAIN] RuntimeError for client {client_id}: {str(e)}")
+        manager.disconnect(client_id)
     except Exception as e:
         logger.error(f"[MAIN] Error for client {client_id}: {str(e)}")
-        await manager.send_message(client_id, {
-            "type": "error",
-            "message": str(e)
-        })
+        try:
+            await manager.send_message(client_id, {
+                "type": "error",
+                "message": str(e)
+            })
+        except Exception:
+            pass
         manager.disconnect(client_id)