We are having problems with copy-paste from one scene to another if the object we copy is inside an assembly.
It's OK as long as a complete assembly is copied, but if I pick a single part it will not stay in it's world coordinate position when pasted into another scene. If I move the part out of the assembly and copy it there is no problem. It will remain in it's correct position.
Surely when you copy a part, regardless of if it is inside an assembly or not, it has to stay in it's original position. Otherwise there's no point in being able to copy-paste at all.