Bug#910496: www.debian.org: Website search box return no results for files later than the 6 October 2017

Package: www.debian.org
Severity: normal

Search on https://search.debian.org/ page for words or any strings
present only in files later than the 6 October 2017 return no results,
for example "Spectre" or "3.22.3-1+deb9u1".

To reproduce:
 - use the search box for the term "Spectre" in English (or any other
language) or for "3.22.3-1+deb9u1" (stable fixed version number for
nautilus in DSA-3994-1 released on 7 October 2017). There are no
results.

It's not an issue with the web browser: I tried with firefox and
chromium. Furthermore the command line request "grep -r Spectre" in
webwml directory returns a lot of results, and likewise, "grep -r
3.22.3-1+deb9u1" returns 5 results.

-- System Information:
Debian Release: stretch
 APT prefers stable
Architecture: amd64 (x86_64)

Kernel: Linux 4.9.0-8-amd64 (SMP w/4 CPU cores)
Locale: LANG=fr_FR.UTF-8, LC_CTYPE=fr_FR.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)