C-Plane changes orientation every time I click on a curve etc

This used to happen once in a blue moon, but it has gradually got worse, and it now happens almost every time I click on something. I keep having to call 4View or a FixViews alias that contains ‘! _SetActiveViewport Top _CPlane _World Top _Enter _SetActiveViewport Front _CPlane _World Front _Enter _SetActiveViewport Right _CPlane _World Right _Enter _SetActiveViewport Perspective _CPlane _World Perspective _Enter’.

Is there any way to make this stop? Any help or suggestions much appreciated.

It’s called CPlane and have you tried to disable AutoCPlane?

Thank you so much. It’s finally stopped. I must have clicked Auto Cplane by accident at some point. I’m still new to Rhino, so I’m still trying to get to grips with how things work.