Chrome: 61.0.3163.91 unknown (I've got this from chrome --version because I can't even open chrome:/version)
OS: Goobuntu / Ubuntu 14.04.5 LTS / 14.04 201709TL2-1

Here is the behavior when I start chrome.
* It opens sign-in in a tab.
* Closing sign-in tab, which closes the browser window, reopens the browser window with sign-in tab.
* Setting focus to omnibox re-focuses the sign-in page's "email or phone" field.
* Activating another window (like terminal) re-activate the chrome window
* Switching to anther tab, but it immedidately switch back to sign in page.
* I signed-in, and it looked successful, but it reopened the same sign in page.
* I could open incognito window, but it immediately set the focus back to the sign in page.
* "menu->exit" does exit the browser.

It's basically "unusable" on my machine (glaptop).

erg@ do you have any clue?

Here is the video.
https://drive.google.com/a/google.com/file/d/0Bx_xtqaB0-v0Qlo1b3JaN08xWVE/view?usp=sharing