UserAgent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/64.0.3282.186 Safari/537.36

Steps to reproduce the problem:
1. Visit the notification test generator URL specified below these steps. Verify that the box for "notificationclose event" is checked. Also verify that the tag selection box is set to either "tag-1" or "tag-2".
2. Allow site notification permissions if you see the browser permission request.
3. Click "Display Notification".
4. Quickly click the body of the notification (triggering an internal "notificationclick" event). Do not swipe away the notification, click the Close button, or the let the notification expire.
5. Once again, click "Display Notification".
6. For macOS-style native notifications, hover over the notification to see the "Close" and "Settings" button, and then click the "Close" button. For legacy Chrome-style notifications, click the top-right X button.
7. Observe that no page alert appears (the "notificationclose" event has not been fired).

Notification Test Generator URL: https://tests.peter.sh/notification-generator/#tag=1;;notificationCloseEvent=true;;action=4

What is the expected behavior?
Each time the "Close" button is clicked on the notification, a "notificationclose" event should be fired.

What went wrong?
When a notification with a tag value has its body clicked and a new notification with the same tag value is closed, the "notificationclose" event does not fire.

Did this work before? N/A 

Does this work in other browsers? Yes

Chrome version: 64.0.3282.186  Channel: stable
OS Version: OS X 10.11.6
Flash Version: 

1. This behavior does not appear if the notification doesn't have a tag.

2. Clicking the notification body for a series of notifications before finally clicking Close only loses the first "notificationclose" event, and subsequent "notificationclose" events are fired.

3. On Mac OS X, this behavior is consistent regardless of whether macOS native-style notifications or legacy Chrome-style notifications are set (e.g. "Enable native notifications" set to Default or Disabled in chrome://flags).

Version Information
-------------------
Google Chrome 64.0.3282.186 (Official Build) (64-bit)
Revision	9611116ee79c63602f452e4fae2242a61cf0672d-refs/branch-heads/3282@{#694}
Operating System: Mac OS X 10.11.6