@Mindy D, by disappear do you mean they are no longer highlighted in yellow?
I will tell you how I handle notifications. When I see that I have a notification I right click on the link and select open in a new tab. If I want to go to the post the notification is about I right click on that link and select open in new tab.
When done with the thread that prompted the notification I close that tab and am brought back to the notification listing and repeat for each one I'm interested in checking.
When done with notifications I close that tab and am taken back to the main topic listing.
However, I am using a PC. If you are using another type of device the foregoing may not work.
The eyes through which you see others may be the same as how they see you.