A sound issue during "Magic Shop" prompted BTS’ Jung Kook to issue a public apology. (Credit: @mnijungkook) Less than 24 hours after BTS opened the North American leg of their Arirang World Tour at Raymond James Stadium, member Jung Kook posted an apology on Instagram, acknowledging a sound issue that had disrupted the performance of ‘Magic Shop’ during the show on Saturday. Writing in Korean on his Instagram story on Sunday, Jung Kook said there had been a sound issue during “Magic Shop” and apologised to the fans who attended the concert. In a second story posted shortly after, he added, “I am mad too.” The apology came after clips of the performance circulated widely on social media, with fans divided over what they were hearing.…