One of those old issues that needs fixing urgently. I click on a notification, get to someone's comment and don't know what they are responding to. So to figure out the context, I unfold the whole thread, then if the thread is big, I have to do a keyword search, then I find nothing, then I browse through the whole thread and have to open any hidden comments that are either on level 6 or more in the Nested hierarchy or hidden below comments by blocked users. I basically just give up more and more often and don't engage with such a comment at all.