(© Enrico Nawrath) A well-loved conductor at the Bayreuth Festival, Christian Thielemann, who made his début on the Green Hill in 2000 overseeing a dynamic performance of “Die Meistersinger von Nürnberg,” served Bayreuth as its music director from 2015 to 2020. Therefore, it is good to see him back this year conducting “Lohengrin” which he originally took charge of in {…}