On an up to date Fedora 26, I click on Download in the Fedora 27 banner in GNOME Software. Download happens and then I click Install. The laptop reboots, Iām told that updates are being installed and it could take a while, but about a second later the computer reboots and I'm back into my GNOME/Fedora 26 session. I tried several times, with a `sudo dnf clean all` and `sudo rm -rf /var/cache/PackageKit` before, same thing every time.
*** This bug has been marked as a duplicate of bug 1519543 ***