Landscape flckering when using Runtime Virtual Texture in 4.27

Hello. I m trying to use RVT on Landscape but I have one big issue that I can not solve. My landscape is flickering when I m trying to change it with rvt. Tried to increase z bounds, switched on and off virtual texture in textures, tried to change size of rvt volume, everything that I found on internet and that comes to my mind. The only thing that maybe can help is that it is not happening in 4.26, probably is just on 4.27 version.

Thanks in advance.