List of possible new items on SharePoint subsite limited to "Space"

Hi all,

We have an issue when trying to add a new page or library to a subsite, using the "New" option of the homepage.

When clicking on "New", the only options we get is "Space" and "Copy of this space".

When we publish changes to the homepage and click on "New" again, the full list of options is available again.

But after a refresh of the homepage, the limited options show up again.

Does someone know how to make the full list available permanently or have any idea how to fix this issue?

Many thanks in advance

Sven