Any one else missing some of the icons for the reactions. I am missing 5 of them. If I hover over where they should be I can still choose them but the icon isn't there.
Edited at 12:17 PM All reaction icons are back
As to the alerts, could ift be that someone didn't realize how old the post was. Occasionally I will come across a post someone has replied to that is up to a year old. I have been known to react to a post on that thread and then realize how old the thread actually is and often the one that started the thread is no longer active on the forum.