KOMA-Script "pageheadfoot" font not taking sffamily

I’ve been typing a document for a few months now and I’m using the class scrreprt. I’ve just noticed that the header font, which used to be sans serif, has reverted back to serif because the koma font “pageheadfoot” is not taking the sffamily command (and neither ttfamily). I reduced the problem to this MWE:

% !TeX TS-program = lualatex
% !TeX encoding = UTF-8
% !TeX spellcheck = it_IT

documentclass{scrbook}

usepackage{polyglossia}
setmainlanguage{italian}

usepackage{scrlayer-scrpage}
setkomafont{pageheadfoot}{sffamily bfseries}
KOMAoptions
  { headsepline=on }
ohead
  { headmark }
ofoot*
  { pagemark }

usepackage{lipsum}

begin{document}
pagestyle{scrheadings}
chapter{Chapter 1}
section{Section 1}
lipsum[1-5]
section{Section 2}
lipsum[6-9]
section{Section 3}
lipsum[10-12]
end{document}

However the output is what you can see here:

UPDATE – I’ve figured a workaround by putting sffamily within markboth and markright… I don’t know whether it is “clean” or “cheating” though.

 *File List*
 scrbook.cls    2019/10/12 v3.27 KOMA-Script document class (book)
scrkbase.sty    2019/10/12 v3.27 KOMA-Script package (KOMA-Script-dependent basi
cs and keyval usage)
 scrbase.sty    2019/10/12 v3.27 KOMA-Script package (KOMA-Script-independent ba
sics and keyval usage)
  keyval.sty    2014/10/28 v1.15 key=value parser (DPC)
scrlfile.sty    2019/10/12 v3.27 KOMA-Script package (loading files)
tocbasic.sty    2019/10/12 v3.27 KOMA-Script package (handling toc-files)
scrsize11pt.clo    2019/10/12 v3.27 KOMA-Script font size class option (11pt)
typearea.sty    2019/10/12 v3.27 KOMA-Script package (type area)
polyglossia.sty    2019/10/27 v1.45 Alternative to Babel for XeLaTeX and LuaLaTe
[...]