The same thing happened to me, my pc crashed and restarted for no reason while I was playing, I tried to put my save in Yuzu, but the same thing restarts the first cutscene as if I had never played, I tried with an old version of Ryujinx, I even tried to start a new game by saving, and putting mine in place, no success, it restarts as if I had never play... My game has more than 200 hours, I'm really disgusted