std :: string更改大小，但不满足

Question

mt19937 rn;
std::string paillier = c.handle_response(req,msgreceive, concessionaria); //receive string from socket
if(paillier.empty())
{
   return 1;
}
rn.seed(random_device()());
n.run(dist6(rn), {}, true, network);
std::cout << paillier.size() <<std::endl; //Here,the size is 1024
n.bootstrap(argv[5],argv[6],argv[3]);
std::cout << paillier.size() <<std::endl; //Here,the size is 400

为什么会发生？ 我试图将paillier存储在指针，引用，const和静态中。总是这样。