Landscape melts to flat as camera approaches

It’s something in your material, I have no idea what…

I’m rather new to game development and I suppose what I am experiencing may not be a bug. But in case it actually is, maybe the attached video can help you determine/fix it.

If this is just an issue caused by my being a noob, could you perhaps provide guidance as to how to remedy/prevent this?

Video of issue

I’m assuming that you’re inferring that the material being used has some blueprint issue that is making the heightmap data distance sensitive?

That looks like tessellated landscape. If that is the case, check to see what distance you have all of that set to.I had a very similar situation, turned out to be the near/far tessellation settings.
If not related to that, I have no idea.