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tblr row to row distance when using \cline

it seems that when using \cline or \SetHline the rows below are displaced downward by the value of the horizontal line inserted. I have three tables in three columns in a beamer slide and at the same height. I tried to compensate with rowsep the row to row distance in one of the other tables but it does not seem to do what i want. I just want to have the row to row distance equal for all tables, despite using any \cline or else in some tables.

\documentclass[aspectratio=169,t]{beamer}

\mode<presentation>
\usetheme{moloch}
\usepackage{tabularray,blindtext}

\newcommand{\titles}[1]{{\bfseries #1\par\vspace{.6em}}}

\setlength{\parindent}{0pt}

\begin{document}
\begin{frame}{aaa}
  \begin{columns}
    \begin{column}{.3\pagewidth}
      \titles{first column}
      \begin{tblr}{colspec={lll},rowsep={2pt}}
        a & b & c\\
        d & e & f\\
        g & h & i\\
        j & k & l\\
        m & n & o\\
      \end{tblr}
      
    \end{column}
    \newlength\mytmp
    \setlength{\mytmp}{6em}
    \begin{column}{.3\pagewidth}
      \titles{second column}
      \begin{tblr}{lll}
        a & b & c\\
        \cline[2pt,blue]{-}
        d & e & f\\
        g & h & i\\
      \end{tblr}

    \end{column}
    
    \begin{column}{.3\pagewidth}
      \titles{third column}
      \begin{tblr}{lll}
        a & b & c\\
        d & e & f\\
      \end{tblr}
    \end{column}
  \end{columns}
  
\end{frame}
\end{document}

Answer*

You could use tikz to add a line to your table, which won't influence the table:

    \documentclass[aspectratio=169,t]{beamer}
    
    \usetheme{moloch}
    \usepackage{tabularray}
    \UseTblrLibrary{tikz}
    \usepackage{tikz}
    
    \newcommand{\titles}[1]{{\bfseries #1\par\vspace{.6em}}}
    
    \begin{document}
    \begin{frame}
    \frametitle{aaa}
      \begin{columns}
        \begin{column}{.3\textwidth}
          \titles{first column}
          \begin{tblr}{colspec={lll},rowsep={2pt}}
            a & b & c\\
            d & e & f\\
            g & h & i\\
            j & k & l\\
            m & n & o\\
          \end{tblr}
          
        \end{column}
        \newlength\mytmp
        \setlength{\mytmp}{6em}
        \begin{column}{.3\textwidth}
          \titles{second column}
          \begin{tblrtikzabove}
          \draw (1-1.south west) -- (1-3.south east);
          \end{tblrtikzabove}%
          \begin{tblr}{lll}
            a & b & c\\
            d & e & f\\
            g & h & i\\
          \end{tblr}
    
        \end{column}
        
        \begin{column}{.3\textwidth}
          \titles{third column}
          \begin{tblr}{lll}
            a & b & c\\
            d & e & f\\
          \end{tblr}
        \end{column}
      \end{columns}
      
    \end{frame}
    \end{document}

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