Jay-Z’s recent concert at Yankee Stadium hit troubles after fans noted equipment glitches. The crowd lingered after their phones failed to sync . Some screens turned off mid-set. An actor stood in for Mary J. Blige after she faced an issue. Teyana Taylor joined later to assist. Blue Ivy Carter took the keys for part of the show. Dame Dash then stated Jay-Z’s recent stadium gigs felt more like commercial tests than real performances .