Yes, it may be a little inconvenience, but I never understood how it goes wrong, and because it can go wrong, it must be a bug...
I noticed several times that people are writing a reply to a whisper (/tell), and if I send them one just before they send them, this reply goes to me, instead of the addressed character.
The only syntax of this command I know is:
/tell <firstname> <text>
So if the command already contains the first name of the addressed character, how can it be sent to another one?
Is there a different syntax (not known to me) which sends the reply to the sender of the last received whisper, not containing the explicit name? This is the only way I can imagine how it can be redirected accidently.