I have an iOS app with App Groups. The app uses the CallKit extension for call block functionality. All data is stored in UserDefaults(suiteName:) and FileManager.default.containerURL(forSecurityApplicationGroupIdentifier: ). I am planning to transfer this app to a different Apple Developer account and would like to clarify how App Groups behave after the transfer: Will my main app Target and CallKit Extensions keep access to the same AppGroups containers with the new Team ID? I will recreate the same AppGroups container identifiers on a new account but my concern is about Team ID change, that can lead to loss access to original containers and all data from previous Team ID. I need to clearly understand whether the app can continue accessing the existing App Group container after the Team ID changes, or if I must manually back up data before transfer and restore all data after transfer completed. As long as the App Group still exists on the original developer account and the user has not updated the app, will the app continue to function normally and access the original App Group container? If I delete the App Group identifiers from the original developer account and recreate it on the new account: 3.1. Will this immediately apply for existing installed apps? 3.2. Or will the impact only occur after submitting and installing a new app version signed with the new Team ID?

In my app I have Local Push connectivity for local push notifications. My app has proper entitlment granted by Apple and NEAppPushProvider was working perfectly on older iOS versions before iOS26. The problem I faced with iOS26: when i enable VPN - NEAppPushProvider stops with reason /** @const NEProviderStopReasonNoNetworkAvailable There is no network connectivity. */ case noNetworkAvailable = 3. But device is still connected to proper SSID that is included to matchSSIDs. I discovered it only happens if my VPN config file include this line redirect-gateway def1 without that line NEAppPushProvider works as expected with enabled VPN. I use OpenVPN app. Is it a bug of iOS26 or I need some additional setup? Please help!