In 2016, the group debuted material from its upcoming third album in concert, and eventually released three of those songs on an EP in April 2017. In July 2017, they delivered the full-length Sacred Hearts Club, which found them exploring a funky, electronic, '80s-style R&B vibe. Produced by Foster and keyboardist Isom Innis along with Josh Abraham, Lars Stalfors, and Oligee, the album featured the singles "Loyal Like Sid & Nancy" and "Sit Next to Me," the latter of which received the remix treatment in 2018 via the Grammy-winning R&B/hip-hop/dance production team the Stereotypes.