After my Galaxy S5 shut down due to battery shortage I tried to open it again. I used the right backup bassword, then it asked me to use my fingerprint which I did and then it asked me for a new backup password. I gave a new backup password. confirmed it by typing it again and then my phone took me back to the screes where I had to give my original password. It looks like it is going in a loop. I can't get out of this.