Only one of my two clownfish hosting RBTA?

[reefy]

I have a paired of clown fish (black ice and darwin) just over 2 months. I recent added a RBTA. I just found out that only one of my clownfish (black ice) is hosting my Bubble Tip Anemone. The problem is the other one won't go near it. Will it eventually go with its mate or maybe not ever? the RBTA should have plenty of room for both (8''x8'')