As far as I know, this is working-as-intended behavior; Chrome doesn't attempt to create new "Sessions" between multiple Incognito windows. The same limitation applies to things like sessionStorage and localStorage (test page https://bayden.com/test/sessions/).

Agree with #1, this is working-as-intended. Mark it as WontFix.

I agree it works as intended but Im disputing the intent. Because it is the intent does not mean it is the correct thing to do. Someone using the incognito is lead to believe they will be incognito due to the clean up but the cookie pool shared is exposng the user. If you want to discard this then Ill need more than that. How can you justify the cookie leaked between incognito windows? Note im not talking about tabs. Id expect the tabs to work together but I would not expect diferent windows to work together. The menu option says "new" and not "another". You at least need to document the behaviour because you are misleading users. Rrgds. 

> Id expect the tabs to work together but I would not expect diferent windows to work together.

"Working together" is simply how things work everywhere in Chrome. When you choose "New Window" from Chrome's menu, the new Window is in the original Session (you can see this using the demo in comment #1). Similarly, if you choose "New incognito window" from the menu, the new Window is within a single Incognito Session.

Chrome doesn't treat tabs and windows differently (which is why you can drag tabs in and out of windows freely).

Notably, Chrome doesn't have a "New Session" command like IE does (
https://blogs.msdn.microsoft.com/ie/2009/05/06/session-cookies-sessionstorage-and-ie8-or-how-can-i-log-into-two-webmail-accounts-at-the-same-time/ ). If you want to have isolated Sessions like this, you should instead use the Profile button at the top right of the window (near the minimize button) to spawn a new Session within a different Profile. 

Ok, yes, the Profiles is doing what I thought Incognito would do. I still don't understand why the new incognito does not simply launch a new session. It is misleading to call it incognito when I'm not really browsing incognito. 

When you open an Incognito browser instance, it explains what it does and does not provide:

"Pages you view in incognito tabs won’t stick around in your browser’s history, cookie store, or search history after you’ve closed all of your incognito tabs. Any files you download or bookmarks you create will be kept.

However, you aren’t invisible. Going incognito doesn’t hide your browsing from your employer, your internet service provider, or the websites you visit."