Grass Foliage Flickering. How do I fix it?

Hi, I have a problem. My grass is flickering. I don’t know why. Google didn’t give me any answers. How can I fix it? UE ver: 4.26.2, all light is dynamic, grass from quixel, quality settings are High.

Video #1: https://drive.google.com/file/d/1cmpDTDtLn-6kQmxoTWnz5yta4n-CrT2F/view?usp=sharing

The little dots flicker. Pixels, I guess.
In mesh preview mode I see some flickering too

Video #2: https://drive.google.com/file/d/1fvx1aw1uMYn15It1fnrul2ABc6Dx1Je4/view?usp=sharing