It could be https://bz.apache.org/bugzilla/show_bug.cgi?id=62044. That
patch (https://bz.apache.org/bugzilla/attachment.cgi?id=35723) is quite
big (~30kbytes), but applies cleanly to the bionic package.
** Bug watch added: bz.apache.org/bugzilla/ #62044
Would you be able to share the config for a reproducer of this bug? I
suppose you have a lot of proxy balancers, and/or vhosts?
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https://bugs.launchpad.net/bugs/1784336
Possibly same bug reported in Debian: https://bugs.debian.org/cgi-
bin/bugreport.cgi?bug=896090
** Bug watch added: Debian Bug tracker #896090
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=896090
** Also affects: apache2 (Debian) via