This had already happened to this coral and I took it to another aquarium and it recovered, I went through it again, it was fine for a few days and the heads closed again. I have not seen any fish or invertebrates bothering it.
Knowing how to dip coral can help you prevent bacterial infections, pests, rapid and slow tissue necrosis (RTN and STN). Overall, coral dipping can improve the overall success of your new coral! See how to dip coral here!