G-Dragon‘s now-deleted post mentioning TWICE‘s Sana has sparked a heated debate about the state of K-Pop. G-Dragon | @xxxibgdrgn/Instagram TWICE’s Sana | @m.by__sana/Instagram Coldplay recently performed in Korea with TWICE as a special guest. G-Dragon attended and shared a clip on Instagram in which he tagged TWICE’s Sana with a shocked emoji, sparking mixed reactions…