The problem is still happening, although of course the Context tool no longer exists, and right-clicking no longer instigates pick-and-drop.

To reproduce the problem in EiffelStudio 6.479451, either target the Feature tool to a feature or target the Class tool to a class. Then Shift+Right-click on the cluster, class or feature name in the tool's title bar. Then move the mouse around in circles.

The attached screen shots prove that it's still happening. In "features.png", I initiated pick-and-drop on the feature, then moved the mouse towards the left; then I initiated pick-and-drop on the class and moved the mouse towards the left; and finally the same thing on the cluster to complete a really ugly bit of graffiti.