boost::geometry::index::nearest: incorrect usage or bug?

[storm-ptr]

Using rtree produces a strange result

output

rtree nearest 297541 vs real 100254

code

https://godbolt.org/z/Gsqcj4Mns

#include <boost/geometry.hpp>
#include <boost/geometry/index/rtree.hpp>
#include <iostream>

using point_t = boost::geometry::model::d2::
    point_xy<double, boost::geometry::cs::geographic<boost::geometry::degree>>;

int main()
{
    auto points = std::vector<point_t>{{173.772, 64.9674},
                                       {169.727, 68.4908},
                                       {170.845, 65.8925},
                                       {166.8, 69.5656},
                                       {167.918, 66.8523},
                                       {172.654, 67.4649},
                                       {175.581, 66.4815},
                                       {178.508, 65.5354},
                                       {177.39, 68.0937},
                                       {174.463, 69.149},
                                       {-179.683, 67.0847},
                                       {171.536, 70.258},
                                       {-176.756, 66.1161},
                                       {179.199, 69.8277},
                                       {-177.874, 68.7402},
                                       {176.272, 70.9745},
                                       {-174.947, 67.7034},
                                       {-168.402, 70.093},
                                       {-173.829, 65.1831},
                                       {-176.065, 70.529},
                                       {-172.02, 66.7104},
                                       {-173.138, 69.406},
                                       {-170.211, 68.3387},
                                       {-169.093, 65.7559},
                                       {-167.284, 67.3194},
                                       {-165.475, 68.9924}};
    auto rtree =
        boost::geometry::index::rtree<point_t,
                                      boost::geometry::index::rstar<4>>{points};
    auto point = point_t{164.531, 69.1568};
    std::cout << "rtree nearest "
              << boost::geometry::distance(
                     point,
                     *rtree.qbegin(boost::geometry::index::nearest(point, 1)))
              << " vs real " << boost::geometry::distance(point, points[3]);
}

[storm-ptr]

PS boost::geometry::index::dynamic_rstar works as expected

https://godbolt.org/z/78GW7zY4T

PPS dynamic_rstar produces a strange result

https://godbolt.org/z/95ds9qqTe