LWC Function Usage View Mode shows unchanging results for Nanite meshes with different LWC usage

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1. Create a new material, and create a material which uses absolute world position divided by some value to drive the UVs of a texture sample. Apply this to one Nanite and one non-Nanite mesh in the scene.
2. Duplicate that material, and insert a TruncateLWC expression immediately after the Absolute World Position node
3. Apply this material to another nanite and non-nanite mesh in the scene
4. Activate the View Mode -> Optimization View Modes -> Material LWC Function Usage
5. Observe that the non-nanite meshes show differing values in the display, while the Nanite meshes show the same value.