I'm so tired of my notifications disappearing before I get to see them. It's been months....

I'm not having that issue.

I don't have an issue similar to what you've described, but my notifications to topics are like hours later or at the most 2 days later, lol~

I have the same problem

I’m having a similar problem, but instead of notifications disappearing, I just don’t get any notifications at all (except for responses to posts and stuff). It kind of sucks.