In the changelog of the last Sydney update 2.63 (December 3, 2025) is given:
- Add boxed layout support for blog archives;
This is a really nice addition and works quite well. Thank you for this. But now the boxed layout of the single blog pages is broken. It appears unboxed although I selecten “boxed” in “Boxed content area” option in general settings of single posts in the customizer.
The same is true for Pages: actual appearance is always unboxed, although “boxed” is chosen.