Mesh created by face aware liquify not re-usable on alpha channel masks

Not sure if this is a bug, or a missing feature, or if Im missing something.

Say I use face aware liquify to change eye shape on a pixel layer. When I have "show mesh" active it properly shows the altered mesh after I make my adjustments.

As I do with any liquify move, I may need to subsequntly apply the same mesh to any masks affecting that part of the image. But "load last mesh" or even loading the manually saved mesh has no effect on the mask.

On "normally created" meshes (i.e. not face aware) it is easy to apply the mesh to all applicable masks but for some reason meshes created with face aware tools will not apply itself to masks.

Is this a bug? Intended beahivior? An oversight on my part?