UE5.2 Landscape Layer Heightmap Importing Issue

I am having difficulties importing heightmaps for my landscapes layers and cannot find a solution.

I have created a few landscapes in the past in UE4 but never in UE5. My landscape is from WorldMachine but anytime I try to import a layer using a heighmap exported from WM, I get the results above.

My WM export is 16bit PNG based on slope.

This is the exact same WM save file and export method as in UE4.

I assume it is the Z value for the heightmap but the new method I found here is confusing, especially in comparison to the previous import method.

Any assistance would be appreciated.

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