Boost asio UDP client not receiving data

Question

I'm trying to send data from the server to a specific client using UDP, without making the client send data to the server first, without sending the server data at all. The problem is that the client waits for data using the receive_from() function, and gets nothing. For some reason the server does manage to send data and after sending the whole payload, it closes itself, but I don't know to where it sends the data. If I run the server without the client the data is also successfully sent, and I don't know why, isn't the server supposed to block the send_to() function until the data is sent?

this is where the client stops (part of my code):

void UDPclient::run()
{
    std::string relative_path = "assets/";
    std::thread thread_context = std::thread([&] {_io_context.run(); }); //start the context.
    file_info fileInfo;

    boost::asio::io_context::work idleWork(_io_context);
    boost::system::error_code error;

    udp::socket socket(_io_context); //the file descriptor 
    
    WirehairCodec decoder;

    udp::endpoint sender;
    memset(&fileInfo, sizeof(fileInfo), 0); //reset the struct to 0 (good practice)

    std::size_t bytes_transferred = socket.receive_from(
        boost::asio::buffer(&fileInfo, sizeof(fileInfo)),
        sender);

    ...

    socket.close();
}

Server(part of my code):

int main()
{
    std::uint16_t port = 2000;
    file_info fileInfo;
    std::string filePath;
    boost::asio::io_context io_context;

    udp::socket socket(io_context, udp::endpoint(udp::v4(), port));
    udp::endpoint destination(boost::asio::ip::address::from_string("127.0.0.1"), port);
    
    boost::system::error_code ec;
    const WirehairResult initResult = wirehair_init(); //initialize wirehair

    if(initResult != Wirehair_Success)
    {
        std::cout << "failed to initialize wirehair: " << initResult << std::endl;
        return -1;
    }

    if (ec)
        std::cerr << ec.message() << std::endl;
    else
    { 
        std::cout << "Enter the specified file (Full path) to send: ";
        std::cin >> filePath; 

        while (!boost::filesystem::exists(filePath))
        {
            std::cerr << "file doesn't exist." << std::endl;
            std::cout << "Enter the specified file (Full path) to send: ";
            std::cin >> filePath;
        }

        read_fileToVector(filePath, vBuffer);
        file_info fileInfo;
        memset(&fileInfo, 0, sizeof(fileInfo)); // Always set the struct values to 0, good practice.

        //send file size, name
        fileInfo.size = vBuffer.size();
        strncpy(fileInfo.fileName, filePath.substr(filePath.find_last_of("/\\") + 1).c_str(), 
                  sizeof(fileInfo.fileName) - 1);
        std::cout << "name: " << fileInfo.fileName << std::endl;
        std::cout << "size: " << fileInfo.size << std::endl;

        socket.send_to(boost::asio::buffer(&fileInfo, sizeof(fileInfo)), destination);
        socket.wait(socket.wait_write);

        ...
    socket.close();
}