Apparently, this compelling question is finally getting its due.
The reason I couldn't find that much on it is because the question is not always posted this way. There are 100 ways to ask this question. Going to post a comprehensive list of links where its being addressed in symposiums, papers, blog posts, scientific theories, etc.
The crux of the problem is that when we are knocked unconscious or in a deep sleep, consciousness is gone and the brain becomes a wet physical organ of great complexity. The problem is that when we reawaken, poof, we are back. the same us. Not a new consciousness as many would think once the continuity is broken from the last one. It should be a new you every time you wake up, but it is not. Somehow, someway, the core 'You' is stored somewhere or retained somehow even when the brain is not generating consciousness. As if you may be more fundamental than the brain, but that is going beyond into speculation. Just want to give the question prior to posting the link list.
Just cool that there is a collective acknowledgement that this is a mystery that cannot just be swept under the rug