Verified answer

I have a lot of trouble with faces. I've had to stare at complete strangers for some time before I could convince myself I don't know them.

Yes. It was one of the many dog walkers whom I associated with over our nearby park and she had a very bad stroke which left her with it, plus an inability to walk. Her ex now has the dog and she has spent months in hospital and then cared for by a relay of social workers/nurses, and not much chance of any improvement in any way.

my grandpa forgot everyone's face before he died.

No