6-6 on the fault phenomenon of color scale

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Photoshop will refill the level range by altering the total amount of pixels in the image or changing the color mode

If you change the total amount of pixels in the image or alter the color mode, Photoshop fills the scale range again.
It is important to note that the total number of changes in image pixels refers to the "image > Image size" or the free transform 〖ctrl T〗, which is globally adjusted for all pixels. The image > Canvas size and Crop tool 〖c〗 are area-adjusted and therefore not valid.

6-6 on the fault phenomenon of color scale