I had an AF ZRH CDG BOD and it just disapeared too. I only noticed it because I had a Paypal email with a refund and traced it back to this ticket number. Took the PL 2 days to get it back on full flights but then I had to pay a second time and it was sorted.

Very scary. Not cool. I think somebody mixed up reservations, cancelled the wrong one and it was a random human error . That's my theory.