Labels are gone when drawing the same circuit again

[Baby1991]

When redrawing the same circuit with a draw command, the labels disappear.

Code to reproduce:

import lcapy

cct = lcapy.Circuit("""
                Vin 1 0_1 DC Vin; down
                SW 1 2; right, l = {dT_s}
                 """)

cct.draw()
cct.draw()

Output:

[mph-]

Well that's weird since it does not happen for me. Can you please send the outputs for

cct.draw('1.tex')
cct.draw('2.tex')

[Baby1991]

Of course

1.tex

\documentclass[a4paper]{standalone}
\usepackage{amsmath}
\usepackage{circuitikz}
\usetikzlibrary{fit, shapes, arrows, patterns, decorations.text, decorations.markings}

\begin{document}
\begin{tikzpicture}[scale=1.00, transform shape, /tikz/circuitikz/bipoles/length=1.50cm, american currents, american voltages, voltage dir=RP]
  \coordinate (1) at (0,2);
  \coordinate (0_1) at (0,0);
  \coordinate (2) at (2,2);
  \draw (0_1) to [V, l^=$V_{\mathrm{in}}$, n=Vin] (1);
  \draw (1) to [closing switch, l_={${dT_s}$}, n=SW] (2);
  \draw (1) node[circ] {};
  \draw (0_1) node[ocirc] {};
  \draw (2) node[ocirc] {};
  \draw[anchor=south east] (1) node {1};
  \draw[anchor=south east] (2) node {2};
\end{tikzpicture}
\end{document}

2.tex

\documentclass[a4paper]{standalone}
\usepackage{amsmath}
\usepackage{circuitikz}
\usetikzlibrary{fit, shapes, arrows, patterns, decorations.text, decorations.markings}

\begin{document}
\begin{tikzpicture}[scale=1.00, transform shape, /tikz/circuitikz/bipoles/length=1.50cm, american currents, american voltages, voltage dir=RP]
  \coordinate (1) at (0,2);
  \coordinate (0_1) at (0,0);
  \coordinate (2) at (2,2);
  \draw (0_1) to [V, l^=$V_{\mathrm{in}}$, n=Vin] (1);
  \draw (1) to [closing switch, l_={t{=}0}, n=SW] (2);
\end{tikzpicture}
\end{document}

Also if its needed, lcapy version is 1.13.2