I have a straightfoward outline structure (Heading 1 = "1"; Heading 2 =
"1.1"). Currently I have Heading 1 defined with a "page break before". Now I
want to keep that, but also starting Heading 2 on a new page, UNLESS it is
immediately preceded by a Heading 1 (no need for a page break, since the
Heading 1 generated already a page break). Setting "page break before" for
Heading 2 doesn't work, since it leaves the Heading 1 titles on a for the
rest empty page (the 1.1, 2.1, 3.1 etc. start on a new page).

Intuitively I hoped it would work as with the "space before", i.e. that it
wouldn't be cumulative for paragraph styles that followed each other. But it
is...

I tried solving it by removing the "page break before" from Heading 1, and
just keeping the "Keep with next", but this didn't work.

How to make this work?