Hello, I'm experiencing a critical issue with my Flutter iOS app on TestFlight where the app shows a completely black screen immediately after launch. The app does NOT crash (no .ips logs in iOS Settings → Analytics & Improvements), but Flutter Engine appears not to start at all. The same code runs perfectly on Android. PROJECT INFO: App Name: CNC AI Assistant Bundle ID: com.beratech.cncassistant Team ID: 958PPWZD27 Provisioning Profile UUID: 8122ca65-b15f-4daa-b0d2-1da5409c6859 Build CI: Codemagic Flutter Version: 3.41.5 iOS Deployment Target: 14.0 Test Device: iPad15,3 running iOS 26.x ISSUE BEHAVIOR: Build succeeds on Codemagic without errors IPA is signed with valid distribution certificate TestFlight processes and accepts the build Tester downloads/updates from TestFlight successfully App opens → completely BLACK SCREEN immediately LaunchScreen.storyboard does not appear App does not auto-close (must be manually killed) NO crash logs generated in iOS Settings Same exact codebase works on Android (Google Play Internal Testing) DEBUGGING ALREADY ATTEMPTED: Replaced main.dart with MINIMAL code (only Firebase init + single Scaffold with white background and Text widget) - still black screen Removed flutter_secure_storage package (had a known iOS 26 keychain init crash) - still black screen Updated IPHONEOS_DEPLOYMENT_TARGET from 13.0 to 14.0 in pbxproj to match Podfile platform - still black screen Tried both empty entitlements and entitlements matching the provisioning profile (com.apple.developer.applesignin + keychain-access-groups) - still black screen Verified GoogleService-Info.plist is registered in pbxproj Verified LaunchScreen.storyboard exists and is valid Verified Info.plist has UILaunchStoryboardName = LaunchScreen and ITSAppUsesNonExemptEncryption = false AppDelegate.swift contains only GeneratedPluginRegistrant.register PROVISIONING PROFILE ENTITLEMENTS: application-identifier: 958PPWZD27.com.beratech.cncassistant com.apple.developer.applesignin: Default keychain-access-groups: 958PPWZD27.*, com.apple.token com.apple.developer.team-identifier: 958PPWZD27 get-task-allow: false (production) INSTALLED PLUGINS (from GeneratedPluginRegistrant.m): firebase_auth, firebase_core, firebase_storage, cloud_firestore purchases_flutter, purchases_ui_flutter (RevenueCat) sign_in_with_apple, google_sign_in_ios shared_preferences_foundation, path_provider_foundation webview_flutter_wkwebview, video_player_avfoundation url_launcher_ios, image_picker_ios, file_picker permission_handler_apple, package_info_plus, device_info_plus app_links, open_filex QUESTIONS: What could cause a Flutter iOS app to silently fail to launch on iOS 26 with no crash logs? Is there a known incompatibility between iOS 26 and certain entitlement configurations? Could there be a mismatch issue between the provisioning profile entitlements and the app's actual entitlements that causes silent termination on iOS 26 specifically? How can I obtain detailed launch/crash logs from the test device when no .ips file is generated? (sysdiagnose only shows system services like BackgroundShortcutRunner, not my app) Are there any iOS 26-specific changes related to TestFlight builds or Flutter Engine initialization that I should be aware of? I have full access to: Complete pbxproj Info.plist, Runner.entitlements, Release.entitlements Codemagic build logs Generated IPA file Provisioning profile (.mobileprovision) Screenshots of black screen on test device Any guidance on diagnostic next steps or known iOS 26 issues would be greatly appreciated. Thank you in advance.