iMac screen recently developed pink edges all around. (iMac Retina 5K, 27-inch, 2019)

Original owner. iMac purchased new in 2020. Never needed to be serviced. Used in an air conditioned environment. Works perfectly except for the pink tint around the edges of the screen.

I've read about this happening to 2015 iMacs, but nothing about later ones. Anyone else seeing this problem with 2019 models?