#234 Visual Artefact When Using `axis line style = {rounded corners}`

[manuelkuehner]

\documentclass{article}
\usepackage{pgfplots}

\begin{document}

\begin{tikzpicture}
%
\begin{axis}[
    width = 20mm,
    height = 20mm,
    xmin = -1.2,
    xmax = 2.2,
    ymin = -1.3,
    ymax = 4.3,
    axis line style = {rounded corners = 5mm},
    scale only axis,
    ticks = none
    ]
\end{axis}
%
\end{tikzpicture}

\end{document}

This creates a additional line, see screenshot.

[manuelkuehner]

Origin of this topic is my answer at https://tex.stackexchange.com/questions/526852.