DrawMeshInstanced doesn't render shadows

I think that the two following calls should have the same result. However when called for the same gameobject, via two mono scripts, the first one renders shadows while the second one does not.

I'm in Unity 2020.3.33f1.

Am I missing something, or should I file a bug?

Shadows:

Code (CSharp):

1.  
2. Graphics.DrawMesh(
3.        Mesh,
4.        transform.localToWorldMatrix,
5.         Material,
6.         gameObject.layer,
7.         null, /* properties */
8.         0, /* subMeshIndex */
9.         null, /* camera */
10.         ShadowCastingMode.On,
11.         false /* receiveShadows */);
12.  

No shadows:

Code (CSharp):

1.  
2.     Graphics.DrawMeshInstanced(
3.         Mesh,
4.         0, /* subMeshIndex */
5.         Material,
6.         new[] {
7.            transform.localToWorldMatrix
8.         },
9.         1, /* count */
10.         null, /* properties */
11.         ShadowCastingMode.On,
12.         false, /* receiveShadows */
13.         gameObject.layer,
14.         null /* camera */);
15.