iOS Perspective Workstation app: Ignition embedded icons are not displaying for an offline project

I am experiencing an issue with Ignition’s embedded icons in the iOS Perspective Workstation app when running in offline mode. None of the icons are displayed. However, when starting the same project offline in the Android version of the app, the issue does not occur.

Is this a known issue with the iOS app, or could it be a caching problem on the iOS device?