Rubber bands: if it not too tight, one frag attached to the rock in a several months, but the main coral- not. The other kind of chili had die-off under the band (I'm assuming that it was too tight or coral was too soft), now have two parts of coral, both alive, only one is attached.
Light and opening: may be there are different kinds of chili coral - I have 3 looking different and behaving differently. All are sensitive to even the medium light (27W over 6g), closing, only one still open, if the food is present in the water column.
May be there are more food in a new place, more food and flow?