My good (yet hypothetical) friend Henry Knerpfit is at it again.
Henry joined the group Cheesemonkeys Anonymous about an hour ago. He did not actually extend an invitation to me, yet it shows up in the Glitch HQ 'activity' tab as:
"Henry Knerpfit has invited you to join Cheesemonkeys Anonymous".
On my PC, it shows up normally, as "Henry Knerpfit has joined Cheesemonkeys Anonymous".