UUID basic_random_generator behavior change during 1.86 release

[corpoverlords]

Hello,

The following code:

#include <boost/beast/core/detail/base64.hpp>
#include <boost/uuid/random_generator.hpp>
#include <iostream>
#include <random>

// Type your code here, or load an example.
int main() {
    std::mt19937_64 rng(0);

    boost::uuids::basic_random_generator<std::mt19937_64> uuid_gen{rng};

    auto generated = uuid_gen();
    auto enc_max = boost::beast::detail::base64::encoded_size(16);
    std::string encoded(" ", enc_max);
    auto buffer = std::string(generated.begin(), generated.end());
    boost::beast::detail::base64::encode(
        (void*)encoded.c_str(), (const void*)buffer.c_str(), buffer.size());
    std::cout << encoded << "\n";
}

Generated

PtxBy8U3SCiL+UA+fDr9/Q==

for Boost < 1.86

But after 1.86 it generated

xTfoKHw6Tf2XMiEKA2n1mA==

which is not listed in the changelog. Is there a way to restore the original behavior?