Steps to reproduce:
- Enter a valid user name
- Invalidate the password field (for example by clicking into it and then outside the field, so it prompts "This field is required." below password input)
- Enter an invalid password
- Click the Submit button
Click just one time and submit login/password to validate them.
Look that we need to click twice to submit the login form and notice that button move to top from original position.
NOTE: This event occurs only in a determinated view resolution of browser. All people crosses this form but few uses that resolution range.