Runtime virtual texture sets landscape to lower mip

RVT is the only way of using complex landscape material with more than 4 or 5 layers without serious performance issue. My landscape material is 3 times more heavy on BasePass than the same material with RVT.
The problem is that lile people here, I can’t find a way of using it without having those visual issues (slow mipmap switching, no mipmap switching unless you move the camera, tiles switching to lower mipmap while not moving the camera, etc.)

There’s a lot of settings in the virtual texture settings, landscape settings, RVT volume settings, RVT node settings, material editor settings, etc. but no documentation about how to use them.
What are the settings we should use to get rid of those issues?