Lionsgate, which produces the show, has resorted to using stand-ins for Sheen in some scenes and has pushed this season's production schedule back.
Sheen's co-stars are not amused and are threatening to walk off the show if his absences continue. However, Sheen's rep told THR that any delays in production were due to other cast members' illnesses and added, "Charlie is always ready, willing and able to shoot Anger Management and looks forward to returning on Monday."
FX ordered 100 episodes of Anger Management in 2012, and the show is about two-thirds of the way through that order.
Of course, this isn't the first time Sheen has had issues on a show. He was famously fired from Two and a Half Men in 2011 after an epic public meltdown.