If it's not a manual page break, then you can't select and delete it. In
that case, read on to find why Word is inserting a soft page break.
I can't discover why Word is inserting a page break.
If the style had "page break before", then surely every paragraph would that
style would be on a separate page, but they are all on page 2.
There is a title and a short "block text" on page 1, then a lot of empty
space, and the heading 1 is on page 2. The document has one section.