Why does it say “that player is offline” when that player is most certainly online?

Question

Every now and then, I try to be social when playing Diablo 3. I like to send friendly messages to friends in an attempt to solicit a reaction that I will find humorous.

However, very recently, I started receiving messages any time I would send someone a tell. The message reads "That player is offline."

^{spugly plz}

The issue here is that... The user very clearly isn't offline. I am now unsure as to whether or not my message went through.

Are my messages still going through? If not, how can I fix this?

Answer 1

Did a search for this issue and found several people facing the same problem.

You can read the official Bug Report posted on the Battle.Net forums.

Your messages are still going through, but will still see this message randomly. It's been reported but so far there is no fix.