Board Thread:Questions and Answers/@comment-34998441-20180418232838/@comment-444327-20180812190140

Carey.adams wrote: Quantum slimes make ghosts of themselves, and with time they become the ghosts, escaping the corral. For the others, the air net CAN be broken, allowing the slimes inside to jump out.

Quantums on their own can't break Air Nets, nor can they fling themselves like this normally; something is at play here that's not on-screen. The problem also wasn't exclusive to Quantums, multiple slime types were despawning within the boundaries of the Ranch.

Or they're just starving to death (they can do that.) No they can't.