Ionic App Rejected Due to Splashscreen not going away

We have tried submitting an app built with Ionic twice to Apple. Both times the submission was rejected. The analyst who rejected it said that it was rejected due to the splash screen never hiding. I have never encountered that and none of our internal tested have encountered this. The splash screen never stays up for move then 10 seconds. I have also tested on the same version and device as the analyst. Any ideas why they are seeing this but I cannot replicate it? This is the details that Apple gave us:

We discovered one or more bugs in your app when reviewed on iPad running iOS 9.3.2 and iPhone running iOS 9.3.2 on both Wi-Fi and cellular networks.

Specifically, the app content failed to load.

The steps to reproduce are:

  • Launch the app
  • A splash screen is displayed
  • No further action takes place.