Image persistence on recently bought iPhone 13

I set my phone to auto brightness but in that photo it was around 50%. I attached the colour I used to check for image retention and I also attached a example image with high contrast to test.

You can test it by looking at the high contrast image for a minute or so and then immediately swipe to that colour. When i did this the apple logo was faded for a few seconds but disappeared. Would like to see if anyone else has this.

I made an appointment early next week at the apple store and see what they think.

you can see in the photo there is like the tiktok icons and the home bar on the bottom of the screen. it’s really faded and it disappears like i’m a few minutes but idk i heard it’s normal but just asking if anyone is experiencing this aswell.

idk if it’s it normal or not.

but would you say it’s normal for a recently bought iPhone? coz i’ve only had it for under a month and i’m worried it’s a sign that it’s going to get worse due a faulty display.