Custom Node plugged into World Displacement cannot convert from FMaterialTessellationParameter to FMaterialPixelParameter

Custom Nodes plugged into World Displacement are yielding:

Error [SM5]  error X3017: 'CustomExpression1': cannot implicitly convert from 'struct FMaterialTessellationParameters' to 'struct FMaterialPixelParameters'

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Currently in the compiled material, it looks like the Custom Nodes are always set to FMaterial Pixel Parameters:

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1. Create a Blank Project with NO Starter Content
   *The following instructions are for recreating the Material shown in the Image Attached.*
2. Create a New Material
3. In the Material Attributes, set the D3D11 Tessellation Mode to PN Triangles
4. Add a Vector 4 to the Material
5. Add a Custom Node to the Material
6. In the Custom Node, set the Input Name to X
7. In the Custom Node, set the Output Type to CMOT Float 1
8. In the Custom Node, Add the following code:

    atan2(X.r,X.g);

9. Add a Vector 2 in the Material
10. From the Vector 2 add an Append Node
11. Plug the output of the Custom Node into the B of the Append Node
12. Plug the Append Node into Emissive Color
13. Plug the Append Node into World Displacement

RESULTS: When plugged into Emissive Color, no issues, When plugged into World Displacement, Conversion issue.

EXPECTED: The Custom node be given the option of being an FMaterial Pixel Parameter or a FMaterial Tessellation Parameter.