When I leave the Password AutoFill settings checked and uncheck Password Provider (orion keychain), the keychain autofill icon still appears in relevant fields. The only reason I noticed this issue was because I wanted to disable the keychain autofill and use 1password. I had to check Use Orion's Keychain and uncheck the other four checkboxes before unchecking Use Orion's Keychain again to get the keychain autofill icon in fields to go away.