Not full race?

At the first race of the season Australia, There are 29 laps and the 29th lap is a lap too so it's 30 laps actually, but this time it only did 29 laps.
It was lap 28/29 and I saved all my KERS for the last lap, but when I got past the finish/start line it ended. Is this a bug or did I just look wrong?

there are only 29 laps

Normally for me when you got past the finish/start line at 28/29 it goes to 29/29 and than after that an other round and not finish, but this time it did.

After that race I had an other race and that one had the full laps, so an other lap after 29/29

Were you the leader in all that races? Afaik, the lap counter goes one up when the leader crosses the line.

In the first one I ended first and second place (2 car account) and the other one second place (1 car account)