Is gravitational lensing ruled out (i.e. the idea that when these sources were found, their images were abnormally brightened or displaced through lensing by an

Is gravitational lensing ruled out (i.e. the idea that when these sources were found, their images were abnormally brightened or displaced through lensing by an object relatively close to Earth (close enough that relative motion and parallax accounts for the disappearance.))