bug with blocks on the nintendo switch

(Sorry for my English half of the text is the translator) In recent years I began to notice that somewhere at the player's eye level, began to appear light lines on the surface of the blocks. I did not even notice them at first, but then it became very striking to the eye. Regardless of the location of these lines all the time haunted. I don't know what this could be caused by, but it's a problem I've only encountered on the Nintendo switch