Steps to reproduce:

1. Visit https://intvrg.gib.gov.tr/ (a site with username, password, captcha of type password).
2. Type "username", "password", "captcha"
3. Click on the key icon to manually save the credential.
4. Observe that the password manager offers to save "username"/"captcha"
5. Change the password to be saved to "password".
6. Click on the key icon again and observe that "username"/"captcha" was saved.