Hmmmm. Interesting. Does it do it all on its own or are you making it to do so? Can you make it spin clockwise constantly? What is the feeling you have when it spins clockwise and when it pops around? I would imagine it would feel slightly unpleasant when it pops around.
Your experience is your own experience and nobody else's. The answers, whatever tehy are, are inside you.
I don't think you are doing anything worng. Things just happen to be that way. The best answer I can give you is, the whole exeprience is telling you something very important about youself. Be gentle to it.