As of https://code.orgmode.org/bzg/org-mode/commit/b186d1d7236c0dc397eadeb004c9a17eaffd3aab
archiving a subtree no longer automatically saves the archive file. How can I get this behavior back?
A Debian bug was also opened for this issue: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=887332