A component shortage is putting a dent in the company's operations.Like the electric vehicle (EV) sector it's a part of, Rivian Automotive (RIVN -1.54%) has been quite stop-and-start this year. One analyst feels this has left the pickup and SUV maker undervalued, even though he recently enacted a slight cut to his price target on the shares. Read on to find out why this pundit is still a Rivian bull.Still bullish despite the price target cutLast week, George Gianarikas of Canaccord Genuity shaved $2 per sha ...