Text moves in Latex Beamer presentation when content in different column changes

Question

I am struggeling with a Latex Beamer presentation.

What I want:

In the attached example I have a frame with two columns. In the left column I added a list of items, in the right column I show a picture. When I klick a key I want to show a second picture with the same size, it should replace the first image without changing the position. If the first and second picture are the same (like in the example) no change should be visible.

What I get:

The second picture, which is the same as the first in this example, moves and also the text in the left column moves, eventhough it should from my understanding not be affected by a change because it is in another column.

Could anyone please help me understanding and fixing this issue?

Example:

\documentclass{beamer}
\usetheme{CambridgeUS}


\begin{document}

\begin{frame}
  \frametitle{Example}

  \begin{columns}
    \column[c]{.5\textwidth}    
    \begin{itemize}
        \item This is an interesting fact
        \item this one is even more interesting         
    \end{itemize}

    \column[c]{.5\textwidth}
    \only<1>{\includegraphics[width=\textwidth]{example-image-a}}
    \only<2>{\includegraphics[width=\textwidth]{example-image-a}}

    \end{columns}
  \end{frame}
\end{document}

Answer 1

You are missing % at the end of line. Without them the line break will be interpreted as space.

\documentclass{beamer}
\usetheme{CambridgeUS}


\begin{document}

\begin{frame}
  \frametitle{Example}

  \begin{columns}
    \begin{column}[c]{.5\textwidth}    
    \begin{itemize}
        \item This is an interesting fact
        \item this one is even more interesting         
    \end{itemize}
    \end{column}
    \begin{column}[c]{.5\textwidth}
      \includegraphics<1>[width=\textwidth]{example-image-a}%
      \includegraphics<2>[width=\textwidth]{example-image-a}%
    \end{column}
    \end{columns}
  \end{frame}
\end{document}