I had a similar issue last year where my rotor would randomly cut out and it would throw an error message. I replaced the wire harness that goes to all the hydraulic solenoids on the main gearbox. It wasn't very expensive, but it wasn't a super fun job to do though. The dealer told me the same thing happened to another guy last year only after he rotor cut out it kicked back in again a few seconds later. The shock load blew up his main PTO gearbox, $60k in damage. I was pretty happy to replace that wiring harness at that point.