I have been playing since 2017 and have an iPad Air with iOS 12.4.2. I can go hours with no problems and now the game is nearly unplayable. It causes my iPad to restart constantly. I cannot get through a series of dailies without at least 2 restarts. I often miss my noon and 6:00 bonus energy due to this. It not only causes reset, it throws the iPad into a reboot cycle.