I actually came across this today within the inSpired community.
Was tagged in a reply post, clicked on the button in the email and saw the original post and comments but could not find where I was tagged or that specific reply. Then I noticed there was a second page, went to the second page, and all of the recent comments, including the one I was tagged in, were there.
This was the thread, for reference:
Does it make more sense to sort the replies by most recent first? Or, have the email button jump to the reply that they were tagged in? Shamefully, it took me maybe just a little bit too long to realize there was a second page of comments.