Hello Mahesh,
thank you very much for your quick reply! I feel so foolish… you are absolutely right.
Had checked this on posts even though I hardly ever edited/played around with the default layout settings there, but never on this page as I thought it was now automatically generated, having no influence on the layout.
However, editing the layout was exactly what I had done on this very page when it was still a “normal page” a long time ago, and apparently I had not reset it.
Reverted it to the default layout, saved it, and of course now it follows the new settings!
I’m very sorry I troubled you with my sillyness, but I’m also very happy that it is sorted 🙂
Kind regards,
Henriët