C++ :: Calling Dynamically Loaded Function From DLL Destruction Error?

I have two projects (Projects A and B). Project A is a dll project, defining a function called "regex".

Project B dynamically loads this DLL, and calls Project A's "regex" function via LoadLibrary/GetProcAddress.

Regex takes a pointer to an std::vector (std::vector<std::cmatch>).

When debugging ProjectB, I can see that, within the code from ProjectA (in the "regex" call), a loop that loops through the elements of the vector outputs all the elements in the vector to console as expected. But the loop in ProjectB ( which executes after ProjectA), which also loops through the vector, and, is supposed to output the elements of the vector, outputs empty strings, not, as I would expect, the same strings (which contain results), as in the loop in Project A.

How is this happening. Does this have anything to do with it being a DLL, and, maybe, somehow values/memory addresses (or something similar) of the vector/its elements being destructed across the Projects/Dlls?

Output and Code See Below:

Output Loop in A:

Un
Un

Output Loop in B: (empty) (i.e. none)

Project A DLL Header (interface.h):

#include "stdafx.h"
#include <vector>
#include <regex>
extern "C" {__declspec(dllexport) int __cdecl regex(std::string target,std::string rgx, std::vector<std::cmatch*>* matches);}

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