On clean Magento 2.2.0 installation I have noticed strange issue with customer password strength validation (during account creation).
We need password not be complicated a lot, so I set up Required Number of Classes to '1' and left min length as default - 8 chars.
But after that I noticed strange password validation behavior.
Expected behavior: user set up only numeric password (12345678 for example) and such password will pass validation. User will see message "Password Strength: Strong".
But real behavior is opposite: when user set up 8 digits length password he get only message "No Password".
Is there any possibilty to fix this?