Vision Jet randomly shuts off

Not sure if this belongs here or elsewhere but here goes.

Last night I did an IFR from KSAF-KSUN in the Vision Jet. On two occasions about 45 minutes apart, the engine randomly shut down and I was forced to restart it manually.

I heard the engine spool down and I suddenly started losing altitude and my autopilot dosconnected. My throttle stick was not responding. Drove me a bit crazy.