Unreal engine 5.7.1 Map generation Bug?

Hello fellow dev’s, I have a question; When I try to load a heightmap as world map in unreal engine 5.7.1 it keeps only rendering 1 corner of the heightmap and repeating it as a tile rather then loading the full heightmap.

I tested the same heightmap on engine 5.4 and it worked fine, backloading and then updating the file to 5.7 destroys that map for some reason.

the dimensions I am working with are 4096x4096

I am trying to implement a 10x10KM map with 3K height, Are my calculations incorrect?
I use 10000x100/4096 for the X/Y axis and 3000x100/512
These same calculations worked fine in older engines so i’m not sure if this is the problem or if it is a bug with unreal engine 5.7.1

Any advice?