My phone keeps asking for my password instead of letting me use fingerprint recognition to unlock my phone. Here is the exact message I am receiving: "Enter password instead of using fingerprint recognition after restarting device to protect fingerprints" I get this message inconsistently (not every time I unlock), about half the time. I was experiencing this issue with my Galaxy S6 Edge shortly before upgrading to the S7 Edge last week, and now I'm having it again. What would be causing this issue, and what can I do to fix it? Is it an app I downloaded? Software issue?