I sometimes notice I will have a notification or perhaps several such. When I click on the bell, half a dozen or less will appear, I might select one and poof - it disappears and I have no idea really what that notification concerned, as I can't search for previous notifications and when I clicked on it - it just disappeared.
About 25% of the time when I click on a notification, I get shunted off to wherever it is referring to and I can see what it is notifying me about. 75% of the time, the notification just vaporizes, leaving me wondering... wtf was that about.
There's no searching for prior notifications, I take it. And we just have to deal with the situation as it is and has been. Even if I do notice a username I might then search for that username and guess what....
Yeah, that username isn't found when using the advanced search method.
Notifications are a pain in the neck LOL