Rhino randomly switches CPlane from World Top to World Front / World Left-Right during modelling in Perspective window. See attached video. I need to click to CPlane World Top icon every few minutes.
Standard construction planes are active in app settings.
@epiphany that is because you have AutoCplane(Object) on.
Thanks @Gijs , you saved my life! I never heard about this new v8 feature until now 
Yeah making that the default was a mistake. It’s not actually a useful feature if you’re doing anything beyond Sketchup-style fiddling with boxes.
You are absolutely right. I’ve been using Rhino since version 1.0, and this “new feature" enabled by default is extremely frustrating.
I’ve just reset my Rhino to check this, but it is not on by default.
It certainly was at one point.