Amoled display and black background?

I received my Samsung Galaxy A71 today.

Now it is the case with the display that if the dark mode is activated and something black is displayed somewhere (e.g. A picture in the PlayStore) and I scroll quickly, the black picture pulls a slightly purple "shadow" behind it.

I had this problem before with the Huawei P30.

Is that normal with Amoled displays?

This is not the case with my oled display on my iphone 11 pro.

The problem occurs with me wherever I seem to meet black on gray

The next time, just go for the only right manufacturer: apple. Unfortunately, can't help you