.607 Password/Security

I have a new and strange problem with .607. When the phone is locked the password entry screen not only displays my password (formerly was * after a brief previos of the character) but it spell checks it and of course changes the entry. Battery pull corrects it but consistently returns after a few days.

Has anyone seen this before?

Thanks,

New to me. Maybe a new application you loaded? If not perhaps a database or something became corrupted. It happens. A reload of the OS will likely fix it.