Unable to reproduce the issue on chrome reported version# 68.0.3440.106 and on latest stable# 69.0.3497.81 using Windows-10 with steps mentioned below:
1) Launched chrome reported version and navigated to URL: https://web-push-book.gauntface.com/demos/notification-examples/
2) Clicked on buttons to generate popup's, able to popup at bottom right of the screen
3) Hovered the mouse over the popup, pop remains at the same position when hovering on it.

@Reporter: Please find the attached screencast for your reference and let us know if we missed anything in reproducing the issue, provide your feedback on it which help in further triaging it.

Thanks!

++attachment

Deleted: 880858.mp4 2.8 MB

	880858.mp4 2.8 MB View Download

So I cannot reproduce with your notification examples demo page, but every other type of notification (e.g. Facebook, Google Mail, Messages for web, etc.) all have the problem of the notification dismissing with the mouse over it.  I'm attaching a screen recording of it happening with in incoming text message notification in Messages for web and then not happening with the example demo.

++attachment

Deleted: screen-capture.mp4 949 KB

	screen-capture.mp4 949 KB View Download

Thank you for providing more feedback. Adding the requester to the cc list.

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot

As per comment #4 tried to this issue on latest chrome stable 69.0.3497.81 using Mac 10.13.6 and Windows 10.
Steps:
-----
1. Launched chrome
2. Navigated https://www.facebook.com and signed in> Clicked on allow notification and minimized the browser 
3. got some notifications and hovered mouse on popup notifications
As we are observed that popup notifications are pause while hovered mouse

@Reporter:Can you verify this issue with fresh profile that is not having any extensions and apps or reset all the flags. 
Could you please upgrade to latest chrome stable 69.0.3497.81, you can download latest chrome builds here:" 
https://www.chromium.org/getting-involved/dev-channel ". Let us know whether issue still persists.

Thanks.!
 

I updated Chrome, created a test profile, removed all the extensions, the only experimental flag I had set was "Tab audio muting UI control" but I reset all to default (relaunched), paired with https://messages.android.com, enabled popups, started screen recording, showed the current state of the browser, sent 2 test messages, hovered over them as each disappeared.  Attaching video.

Thank you for providing more feedback. Adding the requester to the cc list.

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot

++attached

Deleted: screen-capture-2.mp4 4.4 MB

	screen-capture-2.mp4 4.4 MB View Download

**UI mass Triage**

Able to reproduce the issue on Windows 10 using chrome reported version-68.0.3440.106 & latest Canary-	72.0.3610.0 as per steps mentioned in C#0.

Observed that notification(eg: google mail) disappeared while hovering over it from M60 builds to latest Canary. As it is non regression issue, marking it as Untriaged to get it addressed from dev team.

Thanks!!