Sidebar missing on front page

Hi,

I am having the same problem as previous user a few weeks a go (https://ww.wp.xz.cn/support/topic/sidebar-on-blog-site-hides-when-one-post-is-set-to-full-width/). I changed two blog posts to full width and after that the sidebar dissapears on my blog’s front page. However, if you navigate to the second page of the front page (=browse older posts) the sidebar reappears on the front page.

Thank you in advance.

The page I need help with: [log in to see the link]