World Position Offset Object Shadow Cast on Translucent Object Causes Flickering

When a WPO (World Position Offset) object casts a shadow on a translucent object, the translucent object flickers continuously as the shadow passes over it.

Initially logged as a 5.5/5.5.1 but also occurs in 5.6. This is not a regression.

1. Create a Blank BP Project
2. Ensure the following settings are set:
   • Dynamic Global Illumination Method: None
   • Shadow Map Method: Virtual Shadow Maps
   • Anti-Aliasing Method: None
3. Create a plane and place it into the scene
4. Create a translucent material and add it to the plane (e.g., a material with Blend Mode set to Translucent and opacity set to 0.5).
5. Place a WPO-enabled object in front of the translucent object (e.g., the SimplePivotPainterExample provided in the engine).

Results: The shadow cast by the WPO object jitters and flickers on the translucent object
Expected: The shadow cast by the WPO object should interact correctly with the translucent object without causing flickering