I've used 1Password on Mac before, and on Mac the 1Password extension for Chrome also auto-submits the form after auto-filling the username and password. The current extension for Chrome/Linux does not auto-submit; I have to click 'Login' manually. I also can't hit enter because the focus is gone from the form after filling it.
1Password Version: Not Provided
Extension Version: 0.7.6
OS Version: Ubuntu 17.04
Sync Type: Teams