Not everybody is affected by this (and some have been experiencing this longer than I have), but like if somebody replies to a comment you've posted on Facebook, you don't receive a notification for it. I've tried getting help from their support center for this, and in seeking out help, I'm seeing where other people having this problem, and the rumor is floating around that reply notifications are a premium feature that you have to pay for now, and if that's the case, Facebook said nothing about this. But like I said, with the repeal of Net Neutrality, we knew $#!+ like this was bound to happen.