EPI trajectory calculation seems to be wrong

Short description of expected behaviour:
On calculation of the EPI trajectory the sampling times should increase linearly for a single read out line.

Right now the time calculation seems to be correct, the points are not correctly ordered though.

Minimally working example:

import os
import numpy as np
from cmrsim.encoding.epi import EPI


def _plot_trajectory(trajectory: np.ndarray, times: np.ndarray, name: str) -> None:
    """ Plots trajectory and saves it to file

    :param trajectory: (-1, 3)
    :param times: (-1, )
    :param name: sup-title of figure
    :returns: None
    """
    import matplotlib.pyplot as plt
    import matplotlib
    matplotlib.use('TkAgg')

    f, (a1, a2) = plt.subplots(1, 2)
    tx, ty = np.arange(0, len(times), 1), times
    a1.scatter(tx, ty, c=times, cmap="inferno")
    a1.grid(True), a1.set_xlabel("Index"), a1.set_ylabel("$ t / ms$")
    a1.set_title("Sampling times")

    x, y = trajectory[:, 0:2].T
    a2.scatter(x, y, c=times, cmap="inferno")
    a2.grid(True), a2.set_xlabel(r"$\vec{k}_x$"), a2.set_ylabel(r"$\vec{k}_y$")
    a2.set_title("K-space vectors 2D")

    for n in range(len(times)):
        a1.annotate(str(n), (tx[n], ty[n]))
        a2.annotate(str(n), (x[n], y[n]))

    f.set_size_inches(16, 8)
    f.tight_layout()

    output_dir = os.path.abspath("./test_output/encoding/")
    os.makedirs(output_dir, exist_ok=True)
    f.savefig(f"{output_dir}/{name}.png")
        
for samp_mat in [(13, 7), (12, 7), (13, 8), (12, 8)]:
    module = EPI(field_of_view=(0.31, 0.112), sampling_matrix_size=samp_mat,
                         bandwidth_per_pixel=1300., blip_duration=0., k_space_segments=1,
                         acquisition_start=-25.7692, absolute_noise_std=0.)
    name = f"EPI_{samp_mat}"
    _plot_trajectory(module.k_space_vectors.numpy(),
                           module.sampling_times.numpy().flatten(),
                             name=name)

Error Stack-trace: