Background changed on lock screen but the password screen on login screen has a solid color

[blueray453]

Background changed on lock screen but the password screen on login screen has a solid color

I mean when I press super+l, it shows the background, but when i press space to enter password, there is no background image, only a solid color.

P.S. This is a random image from the internet to give an example.

[sunwxg]

When inputting password, the background is blur picture of desktop background. What is your desktop background?

[blueray453]

Here I am attaching my background. It is a .png image.

[sunwxg]

This image is almost one color, after blurred it will be like a solid color.

[blueray453]

In that case it is ok. Thank you very much.