Please check and let us know if you are receiving proper browser notifications on monitor status change if you have enabled notifications from Site24x7 in the browser.
If you are not receiving browser notifications in Site24x7 even after enabling, please check if the notifications are working fine in your browser by using this link: https://pushalert.co/demo
Also, let us know if the Home->NOC view is updated fine.
We are unable to reproduce the issue at our end, please contact our support team if you are still able to reproduce the issue.
Alternatively, try using our 'Public dashboard' which gets refreshed once in every minute for the updated view. You can find this option under 'Share This' ->Make Public.