Ambient Occulsion Decals still render on Static Meshes flagged to ignore them

Ambient Occulsion Deferred Decal Materials seem to ignore the Receives Decals flag that is in the Rendering section of the Details Panel for the Static Mesh.

Tested in 4.21.2 (CL - 4753647), 4.22 (CL - 5660361), 4.23 (CL - 5825806)

1. Download the attached project
2. Open the NewMap1 level
3. Check to see if the Cube mesh has the Receives Decals flag unchecked
4. Wait for the shaders to compile

Expected: The cube should have no shadows on it

Result: The Cube has a panning decal rendering itself on the shadows of the cube Static Mesh