Sprite Previews broken

Unity Engine
1

I recently started a new 3D Project in Unity 20211.22f

After importing Unity’s Particle pack my sprite previews became messed up
.7890952--1004413--upload_2022-2-12_13-52-57.png
This is what it loooks like in the editor, but the real sprite looks like this:
7890952--1004419--upload_2022-2-12_13-53-58.png
As you can see, it shows up way darker in the preview of the sprite.
I also recently updated the icon from an old test model to the new one, and the preview did not update:

Preview:
7890952--1004431--upload_2022-2-12_13-55-34.png

The preview window in the inspector:
7890952--1004440--upload_2022-2-12_13-56-57.png

Is this a bug or intended behaviour? And if its a bug, can anyone please help me fix it?

7890952--1004419--upload_2022-2-12_13-53-58.png

2

I’m new to this forum, so for some reason I attached the image of the ramp again

3

An Update: now the other ones have fixed themselves, but the ones that weren’t affected are white now