Did UE 5.7 break landscape creation?

I have been trying to create a landscape from a heightmap file. The files are 1024x1024 and with correct names.
It works fine in UE 5.5 as you can see here https://freeimage.host/i/B3CibvR
However in UE 5.7 it just doesnt work https://freeimage.host/i/B3CiDYv
Im using all the same settings to import it.
Has anyone else had this issue? Is there a fix?