Tesla (NASDAQ: TSLA ) is once again proving that nothing will keep it down. When China’s rising Covid-19 cases forced the electric vehicle (EV) leader to close the doors of its Shanghai gigafactory, it sparked concern. Some experts worried that the loss of production time would impede Tesla’s progress. For a while, those concerns were valid. Today, though, TSLA stock is back in focus on promising production reports out of Shanghai. One of the company’s biggest constraints may be subsiding. Source: Ivan Marc / Shutterstock.com What’s Happening With TSLA Stock TSLA stock has been rising since the beginning of the…