Transparent package alters tikz color opacity

Question

When using the package transparent for some elements in text, it has a huge side effect: it alters the colors also in any TikZ image of the document.

This is the result without using the package:

\documentclass[border=1cm]{standalone}
%\usepackage{transparent}
\usepackage{tikz}


\begin{document}

Some transparent text.

\begin{tikzpicture}

\draw[fill=yellow,opacity=0.2] (0,0) -- (0,2) -- (2,2) -- (2,0) -- cycle;

\end{tikzpicture}

\end{document}

And this is the result using the package:

\documentclass[border=1cm]{standalone}
\usepackage{transparent}
\usepackage{tikz}

\begin{document}

Some \texttransparent{0.5}{transparent} text.

\begin{tikzpicture}

\draw[fill=yellow,opacity=0.2] (0,0) -- (0,2) -- (2,2) -- (2,0) -- cycle;

\end{tikzpicture}

\end{document}

The correct color for the square is the fist one; the correct transparency for the text is the second one. How to avoid this, having both features at the same time? (Not necessarily using transparent).

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This error generates using TeXstudio 2.10.8 (hg 5802:5ee1d048e556), Qt Version 5.5.1, in Ubuntu 16.04 (all packages are up-to-date), with pdflatex -synctex=1 -interaction=nonstopmode %.tex. Here is the logfile.