What did your bubble tip look like? What is the size of this anemone? This is a time I would ask - can you show. picture in blue light. It does not look like a bubble tip to me (But - if it looks like your old one - its not unheard of for them to make a re-appearance)
I have 20+ inferno anemones, all 6" plus, and one got lost it is currently a size of a quarter, was a size of a dime at some point. Tough one but i have to vote bubble tip, they shrink susbtantially if they dont get light.