How to reproduce:
1. Create a new Unity project and install the Visual Effects package
2. In the Project window, right-click -> Create -> Visual Effects -> Visual Effects Graph -> Minimal System
3. Open the created VFX Graph
4. Right-click on the Output Particle block -> Convert Output -> Output Particle Shader Graph
5. Assign the attached "SG_PetalBlend" Asset into the Shader Field
6. Observe the padding of the "Sub Mesh Mask"

Expected results: There is a gap after the "Sub Mesh Mask" field
Actual results: There is no gap after the "Sub Mesh Mask" field

Reproducible with: 6000.0.55f1, 6000.1.16f1, 6000.2.0f1, 6000.3.0a4

Reproducible on: macOS Sequoia 15.5 (M1)
Not reproducible on: No other environment tested