Tested with the default Ultra INIs, no luck there. Disabling DynDOLOD's output files makes the snow appear as you'd expect from the vanilla LODs.
Noticed glancing again at the meshes that the LOD4 mountain's BSSubIndexTriShape has the name "objSnow-LargeRefobjSnowHD-LargeRef", which doesn't quite look right? But I'm not sure if that's anything.
meshes.zip
Looks like the meshes do have objSnow (or a variation) at all three levels, and nothing past the official plugins is overriding either snow shader on this profile.
Heya! I've been running into an issue with the latest alpha where the snow shader isn't appearing on snowy rock/mountain LOD meshes; mountains far across the map look fine, but around the LOD4-8 range they seem to lose the shader.
Thought it might've been something with my majestic mountains/snow setup, but I'm running into the same thing generating LODs on a fresh MO2 profile- not sure if something else in my install might be causing it. Here's the logs: https://ufile.io/wco3q129