Complex sentence: Hay left the band when it imploded in 1986 due Boy George's drug habit and tensions between drummer Jon Moss, who were former lovers, but reunited with the three original members in 1998 to record a new album.
Split into simpler sentences: Hay left the band when it imploded in 1986 due to Boy George's drug habit and tensions between George and drummer Jon Moss, who were former lovers. Hay reunited with the three original members in 1998 to record a new album.