Image won’t shown, if I added an Tag to the headline

Hi,

I added an <i> Tag to the headline to show an image "vegan-product".
In this case, the image won't shown at the slider:

<img class="slick-loading lazyloaded" alt="Mildes Tonikum mit Brennnesselextrakt <i class=" data-submenu-label="Vegan" data-src="" loading="lazy" src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7">
" data-splide-lazy="https://piadal-kosmetik.de/wp-content/uploads/2024/09/2-1-1-scaled.webp" src="" /&gt;

Maybe you can add a strip_tags to the alt title and it solves to problem?

If you need an access, let me know.

URL to see the problem:

Piadal Kosmetik