This is what my texture looks like before running the game in editor.
[185654-без-размытия.jpg|185654]
This is how she looks after
[185655-размытыи.jpg|185655]
The most interesting thing is that no texture import settings help. No matter how I change them.
It turned out that you can not touch them at all. And randomly in 1 out of 20 editor launches, all UI textures are loaded not blurry.
What’s the matter? Has anyone come across a similar one? Or is it a unity bug?