Samsung, this makes no sense. If display is developing green lines after device been used carefully without any damage, then you should provide free screen replacement as its a well known issue. Its a flagship device, not a budget one!! you should co...
Have you ever get ur phone repaired? Maybe they haven't applied back the adhesive properly.....my brother's s20 fe's back cover was coming off from one side - though the battery wasn't swelling and phone hasn't been ever opened.