People who don't read all replies to an email before replying themselves.
A: "X?"
B: "Y!"
A: "Great, thanks."
C: "Z?"
C: "Ah, sorry, see you've sorted it."
D: "I think B might be able to help"
E: "Y!"
F: "Z!"
G: Fwds it to B with "Can you help A?"
...etc...
my old boss used to work through their inbox from the bottom up, in sequence. which meant you would sometimes get a reply to something 2 weeks later, after it had long been sorted/moved on, and because they were the boss, it sometimes created more confusion at that point.
People who don't read all replies to an email before replying themselves.
A: "X?"
B: "Y!"
A: "Great, thanks."
C: "Z?"
C: "Ah, sorry, see you've sorted it."
D: "I think B might be able to help"
E: "Y!"
F: "Z!"
G: Fwds it to B with "Can you help A?"
...etc...