Beamer figures shifting slide by slide

Question

I'm trying to update a figure over several slides. I have four pictures (all the exact same width and height). I want to display the first image on the first slide, the second image on the second slide, and so on.

I've tried \includegraphics<n> for this purpose, but as I progress through the slides, the image shifts a bit to the right on each slide.

Is there a way to make everything stick in one place?

Minimal "working" example:

\documentclass[aspectratio=1610]{beamer}
\usepackage{graphicx}
\begin{document}
\begin{frame}{Title}
\begin{figure}
    \centering
    \includegraphics<1>[scale=0.7]{first.png}
    \includegraphics<2>[scale=0.7]{second.png}
    \includegraphics<3>[scale=0.7]{third.png}
    \includegraphics<4>[scale=0.7]{fourth.png}
\end{figure}


\end{frame}
\end{document}