gnome-software process using 5.6 GiB of memory in the background

gnome-software isn't open but is using 5.6 GiB of memory... See screenshot attached from System Monitor, I've ended the process (was getting a bit scary - using all my 2 GiB of swap and all my 8 GiB of RAM was all being used too) but if I can get appropriate logs from somewhere do tell me! :)

ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: gnome-software 3.26.1-0ubuntu2.17.10.1
ProcVersionSignature: Ubuntu 4.13.0-32.35-generic 4.13.13
Uname: Linux 4.13.0-32-generic x86_64
ApportVersion: 2.20.7-0ubuntu3.7
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Mon Feb 5 15:57:42 2018
InstallationDate: Installed on 2017-08-03 (185 days ago)
InstallationMedia: Ubuntu 17.04 "Zesty Zapus" - Release amd64 (20170412)
InstalledPlugins:
 gnome-software-plugin-flatpak N/A
 gnome-software-plugin-limba N/A
 gnome-software-plugin-snap 3.26.1-0ubuntu2.17.10.1
SourcePackage: gnome-software
UpgradeStatus: Upgraded to artful on 2017-10-21 (106 days ago)