Page Break Missing Between Nested Folders (Compile to PDF)

UPDATE
Beginning to doubt my own sanity because now it doesn’t seem to be behaving the same way any more. The extra: “A document” no longer forcing page break?

I took out the PREFIX Text “Dummy CUU” from the Title Options of the Layout Chapter Unnumbered (Untitled)

I looks as though both a document and a prefix are required (?) and/or the extra document must contain some non-whitespace text (?) (at least, para, and space along didn’t work; the word “one” did)

ORIGINAL

Scrivener 3.1.5.1, Windows-10

Because of all the parts to be specified I am NOT going to screenshot everything, I am going to describe a Minimum Working Example to demonstrate that page breaks specified for folders directly within folders do not appear in compile output: there has to be an intervening ~document, as shown below.

Would appreciate confirmation from others & workarounds.

[As an aside, Compile setup being challenging for this newbie, is there a list of outstanding Compile bugs that could be consulted?]

Produces this

But if binder item “A document” is excluded from compile, thusly (NO OTHER CHANGES TO section types, layouts, separators, etc. etc. etc. etc.)

we get

QED

PS The content of “A document” is: “This document only here to show that page breaks not working properly unless there’s a document between folders”