It means that in the vertical screen state, the refresh rates on both sides of the screen are inconsistent, resulting in one side being fast and the other being slow, thus producing a jelly-like distortion effect. This problem is mainly due to the fact that the iPadmini6 adopts LCD screen, and the color change of pixels on the LCD screen takes some time, so when the screen is refreshed, the phenomenon of jelly screen will appear because of the different refresh rates of pixels in each column. This problem does not affect the normal use of iPadmini6 and does not need to be fixed.