UserAgent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.108 Safari/537.36

Steps to reproduce the problem:
Setup Details:
   Primary monitor - Desktop Monitor - Dell P2214H
   Secondary Monitor - Dell Laptop monitor

Resolution of both the displays:
   Desktop 1920 x 1080 , 60 Hz screen rate
   Laptop 3200 x 1800 , 60 Hz screen rate

Magnification Level in extended mode of dual monitor setup: 
   Desktop - 100%
   Laptop  - 200%

Issue:
   Notifications are not visible in 200% magnification 
   level of secondary display for extended setup mode. 
   If magnification level is set to 150% or less then 
   notifications are getting shown. The API used to show 
   notification is chrome notificaiton() API. 

   More Info:-
   Dual monitor setup has following has following modes.
   1)Extended
   2)Duplicate
   3)Primary screen only
   4)Secondary screen only.

   The issue is getting seen only in case of extended 
   screen mode for magnification 175% or above.

What is the expected behavior?
Notifications should be visible in every magnification level of extended screen setup mode.

What went wrong?
Notification is not getting visible in extended screen mode for magnification level 175% or above. If magnification level is set to 150% or less then notifications are getting shown. 

Did this work before? N/A 

Does this work in other browsers? N/A

Chrome version: 63.0.3239.84  Channel: n/a
OS Version: 10.0
Flash Version: