mayb you can try to spray cyclopiz at it to make it open and then feed them. Try to be patient as sometime they might need time to used to ur tank condition. My green sun take about 2 week to used to my tank.
I don't direct feed my torch coral.
Just add some Coral food into the tank.
Also ur tank water condition parameter and placement of the coral also act an imporant role for that.
HI, The reason can be the stress of the coral. For my exp. Firstly make sure that the placement to ok for the coral. do some feeding. hopefully they will recover.
btw what is the other LS u have in the tank. what type of lighting u r using?