Blue dots in photos

when I take pictures at night from a scarcely illuminated area to a brighter one, with artificial light sources (lamps) behind the object of the photo, several blue dots appear on the screen and in the pictures (see pics attached). The lenses are clean, the blue dots move in a strange pattern as I move before taking the picture. I went to an apple store, they kindly replaced my camera by the problem persist (see second picture taken after the camera replacement). This is my first iPhone and with my Samsung Galaxy 10 device nothing similar happened to me. Shall I switch back to Samsung? Should we all?