Tesla is facing a tough time: it's racing to improve production of the Model 3 not just to catch up on its backlog, but to avoid serious damage to its bottom line. It's slightly unusual, then, that one of the EV maker's key executives is taking a break from it all. The company has confirmed that Senior VP Doug Field, the head of engineering, is "taking some time off to recharge" (yes, Tesla said that) and "spend time with his family." It stressed that Field "has not left" the team. There's no official word on how long Field will be away, but Wall Street Journal sources described the leave as a "six-week sabbatical."