Your anemone could be acclimating himself to the lighting or seeking refuge from the traumatic event. My BTA's usually hide for the first several days. When i buy an anemone, its coming from no light (shipping), low lighting (fish store's), to metal halides. It can be a big change for them.

What are your parameters? How long did you acclimate? They truly have a mind of their own and won't let you make up their mind for them.