It works just fine in 4.26 but not in 4.27 for odd reasons. To prevent the constant crashing when you try to paint to a landscape layer, you have to remove the virtual texture asset/s from the landscape. I would recommend making a switch parameter that gives you access to your non-RVT attribute as well as your RVT attribute. That way you can still visualize what you paint on your layers. When you’re done painting, reassign the RVT asset/s and turn on RVT.
Remember to save after you’ve finished painting.