I lose all kinds of stuff, even in randori/rolling. I've very recently got to the point where I'm lucid enough to occasionally recall, analyze and have general introspection about in-class sparring, but all that goes out the window in tournaments and probably will for a while. I have vague recollections my last match in my solitary jiu-jitsu tournament, but somehow I ended up taking the guy's back and I still am not sure how I got there.