I'm not sure how much, if any, work has been done to study the brains of people with blindsight. I'm also not sure I would differentiate between loss of visual consciousness and loss of information transfer ... my understanding is that it's the loss if information transfer that is causing the loss of consciousness (e.g maybe your visual cortex works fine, so you can see, and you can perform some visual tasks that have been well practiced and/or no longer need general association cortex, but if the connection between visual cortex and association cortex was lost, then perhaps this is where you become unaware of your ability to see, i.e. lose visual consciousness).

I don't think it's a memory issue - one classic test of blindsight is asking the patient to navigate a cluttered corridor full of obstacles, which the patient succeeds in doing despite reporting themselves as blind - so it's a real-time phenomena, not one of memory.