Someone jumped out of the game before it started.
Its possible to trick the game into booting you by injecting the right malformed packets. If someone quits normally they will show with a DNF at games end, if they bop the game they never show ... the upside is that you dont loose exp etc.
Worked the same in reach beta - so hopefully will also make the final cut. Will help out with that stupid quit ban ... if they honoured the "avoid player" we would need to quit out of games with people you dont want to play with.
But hey, we got what we got.