Using 6.4 pre2.
Just did a maintenance restart and here is what I saw on chat log:
MyBot [GROUP] [MSG] [~Global] Player1: need more for the chicken handler
MyBot [GROUP] [MSG] [~Global] Player2: LFM Black Castle quests
MyBot [GROUP] [MSG] [~Global] Player3: LFM Sanctum of Burning souls
Looks like the bot is listening to Global Chat Channel. I never saw that before. Is that a bug or a new feature?