Time runs slower in the A310 than in real life by about 20%
I just had a flight calculated to last 3 hours according to SimBrief, and ended up with a flight-time close to 4 hours.
MCDU Flightplan and cockpit clock seemed OK and in accordance with my calculations on departure, but slowly drifts behind time as the flight progresses.
I did not pause the sim at any time, and cruised at .80 the whole flight.
Is this a known bug?