Not only every LCD has this but also every OLED. The problem is related to the mounting of the controller board as mentioned in the article. Because of the panel having its refresh sideways to the primary usage orientation, people are noticing it more. If I turn my 11 Pro in Landscape and try some scrolling up/down up/down on this very side - boom jelly effect. If I turn it upside down - boom expansion and contraction effect. It gets broadly noticed when the panel is mounted the wrong way - Oneplus made this mistake with the OP5 if I remember correct, which had its panel mounted upside-down and everybody started complaining. Apple here made the mistake of rotating the panel 90 degrees from the normally used portrait orientation.
There‘s nothing that anybody can do about this other than redesigning the hardware.
Edit: A higher refresh rate of course maskes the problem better. With 120Hz it would be far less or even not noticeable at all.
There‘s nothing that anybody can do about this other than redesigning the hardware.
Edit: A higher refresh rate of course maskes the problem better. With 120Hz it would be far less or even not noticeable at all.