Try to find a low in the tank, medium flow area, and leave it be for a few days -- every time you move it, you may be prolonging the time before it extends again...

EuroMom: Historically, Goniopora has never fared well in aquaria, much the same way that historically, mandarins don't make it... its why we over at WWM typically place our vote against such additions... I hadn't heard about any Goniopora being aquarium-adaptable, but if you've got a frag, obviously someone's found a hearty specimen over the years -- no different from how while most tanks will likely still not support a wild-caught mandarin, the people who are advancing the handling, and eventual breeding, of mandarins are carving the way for the next 'generation'..

-Corruption