Face landmark detection does not appear to work on 😷 individuals

We're well into COVID times now so building vision app involving people wearing masks should be expected. Vision's face rectangle detector works perfectly fine on faces with masks, but that's not the case for face landmarks. Even when someone is wearing a mask, there are still a lot of landmarks exposed (e.g., pupils, eyes, nose, eyebrows, etc.). When can expect face landmark detection to work on faces with masks?