Runtime Virtual Texture used for snow trails is flickering in landscape material

Even if the individual planes don’t overlap each other vertically, the issue still is there. I’m guessing it really has to to with render order in the RVT, since it looks like the planes are pretty much drawn in random order (if I change the texture, I can clearly see that another plane is rendered on top of the others each frame). Does anyone know where the render order in RVTs is set?