There is a shift in the views grid

I think the OP expects the (frontpage) view to take up more width. Instead, the first child div of div.view-id-frontpage has grid-column: 1 / 9; applied to it, so it takes up only 9 grid columns instead of the expected 12.

The cause is that there are layout helper classes applied to the view (and region) template, that manipulate the width of child elements.

@zenimagine, have a look at views-view--frontpage.html.twig for example, where you can see that the class layout--pass--content-narrow is applied.

I'm gonna go ahead and close this issue, as it works as intended. Thank you all for contributing!