What's the deal

Ok I have this green digi that I got almost two weeks ago, polyps were extended it was regaining its green color back, then I moved it yesterday, I really didn't like it where it was , it was almost laying down, so now is about an inch higher almost same flow , but now polyps are hiding , and you can see it's skeleton, they came out last night but not today, any suggestions on this , is this how this (sps) behave , water is normal, all other inhabitants are ok.
Thanks