To reproduce:

1) Use gnome-software to install an application that takes some time to
download (like Chromium or Stellarium).

2) While the application is downloading/installing, click on another
application to see its details (for example, any of the applications showing in
the "recommended" section).

What happens:

The view is switched to the application in question (e.g. the title changes to
the app name) but the view stays blank.

What should happen:

The application details should be shown normally. Furthermore, gnome-software
should let me queue other applications for installation while installing
another.

I don't know if this problem lies in gnome-software, PackageKit or Zypper's PK
backend.