`set_color` doesn't work in `SurfaceTool`

[JekSun97]

Godot version

4.5

godot-cpp version

4.5 stable

System information

Godot v4.6.3.stable - Windows 10 (build 19045) - Multi-window, 1 monitor - OpenGL 3 (Compatibility) - Radeon RX 560 Series (Advanced Micro Devices, Inc.; 31.0.21912.14) - Intel(R) Core(TM) i5-4570 CPU @ 3.20GHz (4 threads) - 15.93 ГиБ memory

Issue description

I can't set the vertex color in SurfaceTool, I did the same process with GDScript and it worked, but with GDExtension (Godot C++) I can't change the vertex color, here is my code:

Ref<SurfaceTool> st;
st.instantiate();
st->begin(Mesh::PRIMITIVE_TRIANGLES);
    for (int i = 0; i < tree.mVertCount; i++)
	{
		st->set_color(Color(0.0, 1.0, 0.0, 1.0));
		st->add_vertex(Vector3(tree.mVert[i].x, tree.mVert[i].y, tree.mVert[i].z));
	}
	
	for (int i = 0; i < tree.mFaceCount; i++)
	{
		st->add_index(tree.mFace[i].x);
		st->add_index(tree.mFace[i].y);
		st->add_index(tree.mFace[i].z);
	}
st->optimize_indices_for_cache();
trunk_inst->set_mesh(st->commit());

To test this I used a standard material with "Use As Albedo" enabled and also Unshaded in Shading Mode, could anyone check this?

Steps to reproduce

Try coloring the vertices and displaying them using a material, using approximately the method described above.

Minimal reproduction project

N/A