A serious incident involving a carbon monoxide leak at Alexander's branch on Taipei's Tunhua South Road during the 2006 Chinese New Year holiday, leading to one death and 11 injuries, was taken as a sign that management competence and service quality had waned after Tang turned the focus of her business to China.
而 2006 年亞力山大台北敦南分部於農曆年期間發生的一氧化碳外洩，導致 1 死 11 傷的重大公安意外，更暴露出唐雅君將事業重心轉向中國後，台灣各分部管理鬆散、服務品質下滑的問題。