bug: r-stretch does not work when combined with fragment

[Xeverous]

Reproduction:

    <section>
        <h2>test</h2>
        <p class="fragment">paragraph</p>
        <img class="fragment r-stretch" src="big_img.png">
        <p class="fragment">second paragraph</p>
    </section>

Effect (Chome Version 126.0.6478.127 (Official Build) (64-bit) on Windows 10):

Moving left/right/zoom all result in inconsistent or broken behavior as on this screen. Sometimes the image pushes the text down (outside the screen), sometimes the image doesn't display.

Refreshing the page sometimes fixes the problem but it works only once and moving slides breaks it.

Expected behavior: imagine these elements but without the fragment class. Now I just want each of these (h2, p, img, p) to appear like fragments do.

This code works if you remove the fragment class from all elements. Somehow the hiding logic breaks r-stretch.