maxv77

Hi I have had my crain v2 for a few days now fitted with a canon eso 650d. the problem I'm having is after a short time of using the joy stick.I can feel a tension building up in the handle. if I then either loosen my grip or hold the gimble by the top. the handle will spin out of control for a few seconds until it stops. Its like its being wound up by an rubber band until you let go and off it spins. Any idea what is going on here? or do I need to return it? cheers.