Whenever I install or upgrade an app after the install step (but before the app is able to launch) my device freezes for between 30s - and a couple of minutes (worst case). During this, it's unresponsive to home button pushes, swipes, etc. After the time passes, it resumes function as normal.
What I've tried
Rebooting, upgrading iOS to latest -- And perhaps most informing, this issue has followed me through 3 phones (2 iPhone 7, and one iPhone X) -- It seems to be with something that gets backed up, so that when I restore from backup the issue then persists.
Note -- It also freezes after I install apps using xcode development. In this case, the freeze is long enough that X-Code thinks that the build has failed and gives me the message "iPhone has denied the launch request." -- But eventually it launches anyway (after the freeze part)