Upper left corner light flicker IP 11

I got an iPhone 11 less than 2 weeks ago and I don’t know if it’s a recent issue since I’ve only noticed it today.

The upper left corner of my screen flickers a white light when I exit out of apps and onto the “background apps” screen. I noticed it doesn’t happen with all apps though—mostly apps with black or dark bg colors on the edges like phone settings, twitter and instagram on night mode. Safari is kinda dark grey but it doesn’t flicker.

See the yellow marking on the photo for exact location of flicker