I had a bubble tip once that kept moving around until it moved right into a powerhead as well
Definitely keep a close eye on it and maybe cover those powerheads as muck suggested.
I also have two rose bubble tips in my tank and they have not moved since I put them in the tank 9 months ago. What I've observed is that if they get a chance to implant their foot into a cave or a hole where they can retract their entire body into it (for whatever reason) then they never feel the need to move. Of course, that spot has to have enough light as well. My bubble tips do that often, they'll spend hours shriveled up in their caves sometimes, but they NEVER leave their caves. In fact, I move one of them around frequently while attached to that rock with the hole that his foot is planted it.