Hello. I tried using the Nanite Landscape, but i get this weird bumps on the landscape. Only happens when Nanite Landscape is enabled. You can see in the pictures the difference between No Nanite and Nanite.
Any help is appreciated! Thanks 
Nanite ON
I have this exactly same problem and I’m unable to find a solution. Have you resolved this yet?
At first I thought it was a raytracing issue. But I had disabled raytracing and the issue remained. Only disappears when NOT using Nanite on Landscape.
It looks similar to the previous nanite issue when using raytracing, where it would use the fall back mesh to produce shadows. I’ve not really used the nanite landscape as when I tried a section of my landscape vanished. Have a look at the nanite settings for fallback and see if adjusting those makes a difference.
Nope no solution yet… just disabled it for now. Also i don’t use RT. Probably an engine issue or something.
I’m having the same issue and it’s still occuring in 5.3.2. The default OpenWorld map applies nanite just fine, but I’ve been unable to import my own landscape and apply nanite to it successfully
It has been fixed and should be in 5.4
