Wrong return value for transpose

Summary

I have some unexpected results when using the transpose method.

Environment

• Operating System : Windows
• Architecture : x64
• Eigen Version : 3.4.0
• Compiler Version : MSVC 19.34.31944
• Compile Flags : /Oxt /std:c++20 /EHs

Minimal Example

#include "Eigen/Dense"
#include <iostream>

std::pair<Eigen::Vector2d, double> func() {
    return { Eigen::Vector2d{11, 0}, 0 };
};

int main(int argc, char *argv[]) {

    const Eigen::Vector2d &result = func().first;

    std::cout << *result.data() << "  " << *(result.data() + 1) << std::endl;
    std::cout << result.transpose() << std::endl;
    std::cout << func().first.transpose() << std::endl;

    return 0;
}

What is the expected correct behavior?

I expect the output:

11  0
11  0
11  0

What is the current bug behavior?

I have the output:

11  0
6.95158e-310 6.95145e-310
11  0

Anything else that might help

I initially asked my question on stackoverflow as I thought I might have been doing a c++ mistake, but now I wonder if it might be linked to Eigen. I know that getting the result of the function as a const reference is controversial but I do not think it is a mistake here. I am out of ideas and I cannot figure out why I have this behavior.