Rivian announced a temporary suspension in production of its Amazon delivery vans.Rivian Automotive (RIVN -3.74%) shares were dropping on Friday afternoon after the company made a surprising announcement. While most of the focus on the electric vehicle (EV) maker has recently related to the unveiling of its next-generation SUV, today's news was about its commercial delivery vans.Shares plunged as much as 5.5% on news that the company has suspended production of the vans destined for e-commerce giant Amazon. ...