I had this happen with my lobo - had a pep shrimp stealing from it on the regular, I started keeping it under a strawberry basket overnight and it worked well. It was my first coral and I had it for three years and it grew multiple new lobes/polyps, then I made the horrible mistake of putting it too close to my galaxea coral - one night is all it took. It started de-fleshing the next day. Two lobes held on for a while and I thought it might rebound but nope it totally gave up the ghost - very sad day they are beautiful creatures when they are thriving. Good luck.Are you feeding your lobo after lights out? About an hour after lights out, it would love small bits of clam. If its not been fed, it may have given up, so just set some on it. Shrimp or other nighttime CUC may try to steal food from it. After a couple of nights in row same time, it will realize FOOD and pull food into its mouth. Once it starts eating, then feed 2-3x weekly. Our lobo is now doing great