I have this issue as well. Specifically and ironically, the Apple Pages app which is quite large.
The name of the app as shown on the home screen is shown as "Loading..." with the wireframe icon and 66% loaded pie chart progress. If I go to the app store, the Pages app progress shows as the "stop" icon with a fully loaded circle around it. If I "stop" it, it goes back to the cloud icon. If I restart the update, it progresses all the way to full circle, then stays there forever. This has been the case now for weeks.
My phone will now crash (black screen, white apple logo) almost every time there is a batch of app updates. I've turned off auto-update because I'd rather expect the crash than have it happen when I am trying to use the device!
I have noticed that this wireframe icon for Pages (though the phone thinks the app is called "") is registered for certain actions, such as opening a DOCX file, and "" is in the Settings list, giving me the option to "ALLOW (NULL) TO ACCESS" with Use Cellular Data switch.
I have tried Reset All Settings, which was a big pain, and did not resolve the issue. I recognize that a full restore as a new phone would likely fix the issue, but I don't want to go through all that if I don't have to spend the time!
