Thin Translucent materials opaque with FS lighting mode and Output velocities active

Im not 100% sure this is a combination of settings that "should" work anyway, but need someone to have a look.

• Thin Translucency
• Output velocities during base pass
• Forward Shading lighting mode
• Project not set to FS?

• Create a new empty project
• Make a new Thin Translucent material as per [Lit Translucency | Unreal Engine Documentation|https://docs.unrealengine.com/4.27/en-US/BuildingWorlds/LightingAndShadows/LitTranslucency/]
  • Material asset from doc attached
• Enable `Project Settings > Engine > Rendering > Optimizations > Output Velocities During Base Pass`
• Restart the editor