This is not a bug. Helix Ultimate never had such a layout from the box. This can only be done through CSS.
One of the solutions
.article-list .article {
display: grid;
grid-template-columns: .3fr 1fr;
gap: 1em;
}
.article-list .article .article-intro-image,
.article-list .article .article-featured-video,
.article-list .article .article-featured-audio,
.article-list .article .article-feature-gallery {
margin: 0;
border-radius: 3px;
border-bottom: none;
}
Result
Helix Ultimate does not have many layouts from the box, but thanks to its pure and understandable code allows you to make any appearance through CSS. This is its main advantage over other template-frameworks.
if I change the template from Helix Ultimate to Helix3 it works
The use of Helix Ultimate and Helix3 (outdated) on one site is not acceptable. Their plugins conflict. You should delete one of them.