In the same way as all their other meshes after SU9. Elevation data is completely messed up in places.
NZ and Iceland have been fixed so far, still waiting for Himalayas/Asia mesh and Alaska to be fixed. Stuff like this in the Himalayas mesh is a good example Lukla airport with Himalaya mesh by orbx cause error in terrain near take off and landing zone
I don’t have specific examples to show for Alaska but saw some very odd stuff on a test flight after SU9 before I removed it.
EDIT: This sort of stuff… Valdez (PAVD), Alaska terrain bugs due to Orbx mesh
As they have fixed the other two I mentioned I have no doubt they are fixing the two remaining meshes. I still dont think they should be selling a broken product while they fix it, but for anyone who wants to take a punt they are on sale at a very good price.