UserAgent: Mozilla/5.0 (X11; CrOS x86_64 10323.67.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/65.0.3325.209 Safari/537.36
Platform: 10323.67.0 (Official Build) stable-channel edgar

Steps to reproduce the problem:
1. Enable chrome://flags/#fill-on-account-select
2. Save a password on a site that is a SPA with the login form always present in the page's source code, such as https://gw2efficiency.com/
3. Open the site in a new tab. The account selection dropdown appears in the upper left corner of the browser viewport even though I am already logged in and the login form is never shown to me.

What is the expected behavior?
The account selection dropdown should not appear until either the username or password field has focus.

What went wrong?
The account selection dropdown appears immediately on page load. I've noticed that I sometimes get a full browser crash if I navigate away from or close a page where this happens before it is fully loaded.

Did this work before? N/A 

Chrome version: 65.0.3325.209  Channel: stable
OS Version: 10323.67.0
Flash Version: 29.0.0.113 /opt/google/chrome/pepper/libpepflashplayer.so

Possibly related to 833432, but I do not have any computers with multiple monitors.