Is it possible to add a part which contains in context references to a new subassembly and maintain any existing in context references in the part?

For example, say I have an assembly made up of Part A, Part B, and Part C.  Part B has in context references to Part A.  If I then select Part B and Part C and choose "Form new sub assembly here" Solidworks will form the new sub assembly without giving me any warnings.  When I open the main assembly later the in context references in Part B are now all shown as out of context.