Virtual Texturing Feedback

I am using tiled landscape (with World Composition), and I am trying to use VT. It worked great with one, “solid” landscape, but 8129x8129 landscape is never a good idea, so I switched to tiled landscape. The problem is that when my terrain tiles are not loaded in the editor, landscape in game is just black. When I load them - the textures are correct in game, but when I unload them again, terrain in game is black again. What’s going on with it? Thanks!

Edit: I have noticed that when I build my game while all tiles are loaded, it actually works. But only for landscape, and not for landscape LOD meshes (my LOD meshes are using the same material and virtual texture as landscape). Those LOD’s are just black. At least it is a progress…