Description of problem:
After using gnome-software you can not see your package transactions (installation, removal, update, …) in dnf's history database. This renders `dnf history` pretty unreliable and `dnf history userinstalled` can't be used any more to get a kickstart file.
Version-Release number of selected component (if applicable):
AFAIK the plan here is to make both DNF and gnome-software use libhif and have libhif write to the shared database.
Similar story when a package was installed via /usr/libexec/pk-command-not-found (part of PackageKit-command-not-found) then it also isn't listed in the output of `dnf history userinstalled`.
*** This bug has been marked as a duplicate of bug 1259865 ***