Complete engine failure during missions?

Is anyone else experiencing random engine failures during the beginner missions? I had this happen three times on Tutorial 8 (transitioning to jets) where I'd be sitting on the runway and all the engines would fail. Restarting the SIM didn't help, I actually wound up rebooting then it went away.Same thing just happened trying to do the Telluride Landing. I just had everything finish loading, and all of a sudden all the engine failure warnings came up on the glass display.What causes this? How do I fix it?Neil