Versioned documentation search no longer working

Hello pg webmasters,

I've noticed that the documentation search on the site is currently in a
poor state.

Previously, when looking at the documentation for a specific version (like
https://web.archive.org/web/20170905162419/https://www.postgresql.org/docs/9.5/static/index.html
), searching for terms in the search box would take you to a filtered view
for that version (with a "u" search parameter set to "/docs/$VERSION/",
with version values like "9.5", "11", "current", and "dev" supported. This
no longer works at all, and the experience of searching the documentation
right now is consequently very poor.

Going to these URLs directly (as I do with a chrome custom search rule)
will still work for most versions, but not for "current" or "11" (example:
https://www.postgresql.org/search/?u=%2Fdocs%2Fcurrent%2F&q=array_agg ). In
fact, no results of any kind seem to appear for version 11 (example:
https://www.postgresql.org/search/?q=array_agg ).

Both of these issues (searches no longer automatically filter for the
currently viewed version, and current documentation is not indexed) are
serious regressions in the usability of the site.

Thanks for your work
Regards