Could be fakes.

I would return it. The oled is fire!

I got a crazy amount of downvotes for saying this…but I upgrade every year and buy 2 phones (returning one). About 50% of the time my phone is perfect in every way, however 50% of the time their is some sort of defect most common I’ve seen are scratches/dents, touch screen dead spots, screen color issues (too warm color wise or choppy), and most recently memory issues.