What happens if you move it more than just 5 degrees? And does it happen regardless of which way you turn iit? I've had strange things happen sometimes when things are rotated only minutely. Another thing to try is to parent V3 to something (like the ball prop) and rotate THAT. Then see what happens. I think this is akin to the gimbal lock in Poser.

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You just can't put the words "Poserites" and "happy" in the same sentence - didn't you know that? LaurieA
  Using Poser since 2002. Currently at Version 11.1 - Win 10.