Users are reporting issues with page publishing in Discourse, where logged-in users see a broken layout with missing sidebar, icons, and other elements. darkpixlz notes the problem is resolved when using the Default theme, suggesting a conflict with the Air theme. JammyDodger confirms the Air theme works fine for them, while Don explains the published page is intentionally styled as a minimal reader view, with limited sidebar and header. The issue stems from custom theme code—specifically an old ::before background rule in the theme—darkpixlz identifies as the culprit, which can be fixed by removing it.
FWIW I’ve just tried publishing a page while applying the Air Theme and it seems to be working fine for me. Both the sidebar and summary, etc show up fine on the original topic.
Published page has a different style. I think this is designed to minimalistic and it a kind of reader view. Sidebar is not available (yet) on published page and the header is also limited.
Here is the stylesheet for published page:
Discourse Air theme adds a few modification to published page to fit to the theme but you can override these with a theme component if it is not fit with your customizations.