Don't worry about it, its a minor visual problem you get with larger gradient changes on 4km maps
Burning sands (the map in the picture) has smoothed terrain to help hide it though you've found one of the few locations you can see it in action
the best example is on Kashan Desert, see how the mountains change shape where its a bit too 'pointy' when you approach them, or when you see floating enemies you cannot kill because they are on this 'morphing' terrain.
Its a BF2 engine limitation, not a problem client side

zooming in corrects it by how zooming changes what geometries you see