[18:04] BigWigs: LittleWigs is sending the entire clue to chat as it detected an unknown clue, please report it on Discord/GitHub/Curse so we can add it and shorten the message.

[18:04] BigWigs: TELL THE AUTHORS: New clue 'The one that Elisande invited to the party? Now I didn't say this, but that one is really a spy for the Burning Legion.' with 'enUS'

and another one
[18:08] BigWigs: TELL THE AUTHORS: New clue 'A rumor about someone new to the party? I heard it's a member of the Burning Legion keeping tabs on us!' with 'enUS'

Since it happens on every NPC, it sounds like a conflict with another addon you have installed.

Only happend on 2 of the clues

Should be fixed by b62622f