Textures become blurry, can't fix

Hi friends,

I was working on the project and then I realized that there’s a good option available for landscapes, called “layers”. So if I check “Enable Edit Layer”, my entire map becomes blurry after I apply paint, same if I create a new landscape with the enabled option already. All textures mixed up with their tiling settings and probably mipmaps, etc… Is there a quick fix for that?