Why does this C++ closure produce different outputs?

I am trying to learn the concept of closures in C++. I have the following code.

std::function<void(void)> closureWrapper2()
{
    int x = 10;
    return [&x](){x += 1; std::cout << "Value in the closure: " << x << std::endl;};
}

int main()
{   
    std::function<void(void)> func2 = closureWrapper2();
    // std::cout << "---" << std::endl;
    func2();
    func2();
    func2();
}

Output

Value in the closure: 11
Value in the closure: 12
Value in the closure: 13

Now if I uncomment the cout statement I get the following output.

Output

---
Value in the closure: 32765
Value in the closure: 32766
Value in the closure: 32767

Can anyone please explain why printing something before the function calls changes the output?