[Clownfish518]

Anemones move to find a perch that they like, water flow that they like, or lighting that they like. Its generally one of these three. Sometimes food.

Of these three, I like to alter water flow to encourage them to move first - either increase or decrease, more direct or less direct. Moving them by hand can really stress them, and is futile anyway as they can move themselves right back.

Do you have any crevices or overhangs in plain view for the BTA? Some like to poke out from under overhangs, some like to bury their column in a crevice.

I would give it a week or two to see, and plot how to make life for it uncomfortable for it in its current spot