Extra <span>…</span> around accented chars in names from biblatex

[njbart]

Example (biblatex entry adapted from biblatex-examples.bib):

#!/bin/sh

echo "
@Patent{item1,
  author       = {Almendro, Jos{\'e} L. and Mart{\'i}n, Jacinto and S{\'a}nchez,
                  Alberto and Nozal, Fernando},
  title        = {Estimateur d'un d{\'e}faut de fonctionnement d'un modulateur
                  en quadrature et {\'e}tage de modulation l'utilisant},
  date         = 1998,
  langid       = {french},
}
" > test126.bib

pandoc -F pandoc-citeproc -t markdown-citations-markdown_in_html_blocks << EOT

@item1

---
bibliography: test126.bib
...

EOT

# rm test126.bib

Actual output:

Almendro et al. ([1998](#ref-item1))

Almendro, Jos<span>é</span> L., Jacinto Mart<span>í</span>n, Alberto
S<span>á</span>nchez, and Fernando Nozal. 1998. “Estimateur d’un défaut
de fonctionnement d’un modulateur en quadrature et étage de modulation
l’utilisant.”

Expected: no <span>…</span>

Note that output from pandoc-citeproc -y test126.bib does not show these <span>…</span>.