Unable to reproduce this issue on Windows-10 using chrome latest stable #61.0.3163.79 by following steps mentioned below.

1. Navigated to https://framework.realtime.co/demo/web-push/
2. Clicked on send notification multiple times
3. Pressed chrome short cut keys like Ctrl+Tab, Ctrl+T, Ctrl+Shift+N
4. Able to perform operations accordingly without any blocking

Reporter@ - Are you able to reproduce this crash consistently including incognito mode? Please recheck this issue by upgrading your chrome to latest stable #61.0.3163.79 and create a new profile under chrome://settings with no apps or extensions in your browser.

Thanks!

Unable to reproduce this issue on Windows-10 using chrome latest stable #61.0.3163.79 by following steps mentioned below.

1. Navigated to https://framework.realtime.co/demo/web-push/
2. Clicked on send notification multiple times
3. Pressed chrome short cut keys like Ctrl+Tab, Ctrl+T, Ctrl+Shift+N
4. Able to perform operations accordingly without any blocking

Reporter@ - Are you able to reproduce this issue consistently including incognito mode? Please recheck this issue by upgrading your chrome to latest stable #61.0.3163.79 and create a new profile under chrome://settings with no apps or extensions in your browser.

Thanks!

After further testing, it appears that focusing the webpage will allow keyboard shortcuts. Switching back to the tab focuses the prompt dialog again. Simply opening the web page displays the prompt and blocks input. 

Version 61.0.3163.91 (Official Build) (64-bit)

Thank you for providing more feedback. Adding requester "brajkumar@chromium.org" to the cc list and removing "Needs-Feedback" label.

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

@Reporter: Could you please let us know what kind of notification is blocking the user input?

Thanks

It's in the title... "Desktop notification prompt"

Thank you for providing more feedback. Adding requester "kebalaji@chromium.org" to the cc list and removing "Needs-Feedback" label.

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

Tested this issue on Windows 7 using chrome version stable #61.0.3163.100,canary #63.0.3236.0 and unable to reproduce the issue

Steps included are:
-------------------
1. Navigated to https://pushify.com/
2. Clicked on send notification 
3. Pressed chrome short cut keys like Ctrl+Tab, Ctrl+T, Ctrl+Shift+N
4. Able to perform operations accordingly without any blocking


@ Reporter: Could you please upgrade your browser and recheck this issue on latest stable #61.0.3163.100,canary #63.0.3236.0. If the issue still persists please let us know your observations.

Thank you! 

Closing issue as Wontfix due to lack of feedback requested but not provided. If the issue still exists please open a new issue with the details requested.

Thanks..!