blue jabo in pics 1 & 2 (m vexator)
pic 3 is (Sabara)( M. jaboticaba) always sold mislabeled as M. cauliflora, which I can assure you, it is NOT
pic4, is the Hybrid Red Jaboticaba, aka Precoce, or Hibrida...looks like maybe yours got dry? or maybe too much fert? or high pH city water?
it will bounce back don't worry..just keep it watered, and don't over fertilize it..they can die from too much Nitrogen