I'm having a really annoying problem with my clusters on my Spine IK. For some reason they keep disappearing for no apparent reason. After they vanish, I would put them back in and connect back to all the controls, however after a while as I'm working on my rig they just disappear again.. Its really weird. I haven't the faintest idea why this is happening and I 've looked up the problem online but with no clear solution or reason.
Any sort of idea to why my clusters keep pulling a disappearing act would be really welcomed :)
* Just realized that every time I delete history on anything from polygons to nurbs circles, the clusters disappear. Can anybody enlighten me to why?