Ubuntu
gnome-software package

  1. Bug #1775226
  2. Comment #4

Comment 4 for bug 1775226

Revision history for this message
Sebastien Bacher (seb128) wrote : Re: Gnome Software offers installation of updates on shutdown independently from update-manager and unattended-upgrades

Googling a bit I found an old Debian discussion on https://lists.debian.org/debian-devel/2015/08/msg00548.html which state that packagekit creates the offline update file when a client requests for one. Did you use gnome-software and if so what did you click in there exactly?