Unchecking UseSingleProcess seems to fix the issue for me, as well as getting rid of all the OnRep stuff in the parent class of the class that is causing the break when you run the editor from VS debugging.
Unchecking UseSingleProcess seems to fix the issue for me, as well as getting rid of all the OnRep stuff in the parent class of the class that is causing the break when you run the editor from VS debugging.