For the last couple of days, since I ran the latest update, my S5 has randomly required me to enter a password to unlock it. I already have a pin that I use and both my phone and external card are encrypted. Twice now it's asked me to enter a password to unlock the screen. I try a password that I think it could be and it's not correct, so my phone resets. Has anyone else had this issue or know of anything I could try to fix this? It's happened when I wasn't around Wi-Fi so a huge portion of my data has been used with the phone downloading items after the reset.