Tessellation on landscape + bad landscape sculpting spot

It’s one of those things that once you know you can’t forget, much like occlusion.

This is from a while ago - I haven’t checked to see if the latest versions have corrected it.
My assumption is that a mesh creating a cliff face went missing.

Near Rovna, on the way to Talmberg - in the forest, sort of near one of the Cuman camp spots.