Council members Linda Gail Dennison and Timmy Sapp were also facing recall petitions, with the council holding a hearing on the charges. Two former mayors have signed the petitions. The issue appears to be their initial opposition to the hiring of the City Clerk. There's also a kitchen sink of other complaints over meeting attendance, open meeting violations and claims of censorship on social media.
Georgia is a malfeasance standard/judicial recall state, so a showing of cause is needed. I haven't seen any discussion of whether this has already occurred.