Incompatibility Middlenware and ExceptionRender LARAVEL 5.1?

I have Middlenware to control access to illegal routes, but there is a session variable that sends you to abort 502 and it has ALWAYS worked.

Today I have started to play the render for the handling of the exceptions produced by Mysql and now when I try to access a route without being logged in I miss the page of the Mysql error and it does not jump abort 502

Middlenware: It always worked:

Route::get('HomeJefe', [
    'uses' => 'ControladorJefeDept@index',
    'middleware' => ['ComprobarLogin', 'ComprobarJefeDept']]);

Check Login

    public function handle($request, Closure $next)
        {

            if(\Session::has('conectado')){
                 return $next($request);
            }else{
                abort(502);
            } 

        }

CheckJefeDept

public function handle($request, Closure $next) {

        $jefe = False;
        $conectado = \Session::get('conectado');


        foreach ($conectado->getRol() as $tipoRol) {
            if ($tipoRol == "Jefe Departamento")
                $jefe = True;
        }

        if ($jefe) {
            return $next($request);
        } else {
            abort(503);
        }
    }

Exceptions: handler:

 public function render($request, Exception $e) {

        $mensaje = $e->getMessage();
        $mensaje = substr($mensaje, 0, 49);

        if ($e instanceof ModelNotFoundException) {
            $e = new NotFoundHttpException($e->getMessage(), $e);
        }


        \Session::put('mensaje', $mensaje);
        return redirect('error');  

        // return parent::render($request, $e);
    }

On the route:

Route::get('error', "ControladorSistema@error");

System controller:

class ControladorSistema extends Controller {


    public function error(Request $request){ 
         return view('errors/PagError');
    }
}

Since I put that code in the render, it does not go to the abort (502) anymore but goes directly to the PagError view.

Solution ::

Exception handler with dd looks at the type of error it is and redirects:

 public function render($request, Exception $e) {



        //dd($e);


        if ($e instanceof \Illuminate\Database\QueryException) {
            $mensaje="Problemitas con la bbdd";
            \Session::put('mensaje', $mensaje);
            return redirect('error');
        }

        if ($e instanceof NotFoundHttpException) {
            $mensaje="La pag no existe.";
            \Session::put('mensaje', $mensaje);
            return redirect('error');
        }


        if ($e instanceof ModelNotFoundException) {
            $e = new NotFoundHttpException($e->getMessage(), $e);
            return parent::render($request, $e);
        }


        //\Session::put('mensaje', $mensaje);
        // return redirect('error');  
        //return parent::render($request, $e);
    }