Elegance coral question

I have had an elegance coral for like 8-10 months (dont know whether aussie or indo), initially it was doing great fully expanded beyond the skeleton like 7x6". Now for the past 2 months it does not extend anymore, tentacles have shrunk and it does not open as much as it did. It still has good feeding response though when i feed it chunky meaty food (unless clowns or shrimp steal the food).

Few notes:

- Water is fine as i am keeping lost of sps and acropora
- EC is placed at the bottom with moderate flow, its skeleton has been raised (since i got it) over a piece of rock, so it is not in touch with the sand bed, not even its tentacles touch the sandbed when it used to extend.
- did not dip so far as i dont want to mess things up, i know these corals are a bit finiky and i dont want it to melt on me.

any ideas?? or thoughts?

thanks