Paul A. Rubin wrote:
Turns out the document is in koma-book, and that apparently clobbers afterpage. Inserting \setbibpreamble{\thispagestyle{empty}} in ERT before the page break above the bibliography did the trick for me.
Spoke too soon. This does indeed work with koma-book, but he's actually using report, which also seems to clobber afterpage. I got this to work with report: \renewcommand{\bibname}{\thispagestyle{empty}Bibliography} in ERT before the page break leading to the bibliography.
