Reddish tone appears just for a fraction of sec on iPhone se2

When ever I turn down the brightness of my iPhone se2 from max to min just like instantly I see a reddish tone on the screen just for a fraction of second then it’s normal I dono that is it a device defect or it’s there on all iPhones . It’s only when I do the brightness change very rapidly and from max to min it’s visible easily but it’s only when turning the brightness and it’s gone like instantly ,it just appears like a reddish color on screen . Is this a defect should I replace my phone because it’s just bough very recently and I still have that option .is this happening on all iPhone se 2 .please anyone answer and if u have iPhone se2 then please even check by increasing your brightness to max and instantly reduce it to min on white and high to low instance change of brightness it’s easily visible ,if it’s there then it’s a problem on all se2 devices or is it a normal thing with iPhones please answer my question ASAP. thank you