iCloud Keychain is the culprit for me.
I tried turning this function on again, went through all the steps and then got home and it had difficulty connecting and then I had to select it and the password was gone. I did not have this problem for all the days I had iCloud Keychain off. So, I turned iCloud Keychain off and, after getting on wifi w/password and such, back to normal.
This is the first iteration of iCloud Keychain, so I'm sure it'll improve in future beta releases, I'm staying away from it myself, will try again in beta 3 (next week!
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