Safari cleared all my saved passwords?!
For no apparent reason, upon starting up today, Safari has removed ALL of my saved AutoFill usernames/passwords. Restarting doesn't help, neither does clearing the cache and restarting Safari. Passwords are all gone from Keychain Access. I had the same problem back in August – again, no warning, so discernible reason, and I couldn't get them back.
Advice, anyone?! What is happening? Can I restore my saved passwords?
MacBook Pro (13-inch Mid 2012), macOS Sierra (10.12.3), Safari (10.0.3)