Mesh Decal Result the mesh which set received decal black in vr

When set a mesh with received decal and Enable DBuffer Decal. And make a mesh with mesh decal and open receive decal.this may make the mesh which receive decal(not mesh decal mesh) get black in vr when camera in some position and rotation. And I found the Dbuffer A,B,C texture totaly get black in Intel GPA tool. And this make ColorOpacity get zero and lead to base color be zero.