Engine cut-off at high speeds

Any thoughts? yes lots but none that would be helpful LOL

But seriously it sounds like one of the sensors is breaking down, but this should have show up on an electronic diagnosis at the dealers so maybe there is a broken wire in the engine loom thats parting as a set resanance due to speed and sound of the engine. i know this sounds wild but i have found this on other motors. its one of them hard to find things.

regards JR