iOS app crashes on launch — GoNativeAppConfig processConfig SIGABRT (build 39, iOS 26.5)

Hi Median team,

My iOS app crashes immediately on launch — it does not even load the splash screen. This happens both on the App Store reviewer's device (the submission was rejected for 2.1.0 Performance: App Completeness) AND in your own Median simulator. It is fully reproducible.

App details:

App name: BC Coaching
iOS bundle ID: hu.bcbb.app.ios
Build version: 39 (1.0.0)
Crashing device in logs: iPad15,3 (iPad Pro), iOS 26.5 (build 23F77)
Median app ID: 260k0bc1kuwekngn4u8hdm11b8

The crash is a SIGABRT (abort() called) thrown during app config processing at startup. The last exception backtrace is:

CoreFoundation __exceptionPreprocess
libobjc.A.dylib objc_exception_throw
CoreFoundation -[__NSDictionaryM removeObjectForKey:]
GoNativeCore -[GoNativeAppConfig processConfig]
GoNativeCore -[GoNativeAppConfig setupFromJsonFiles]
GoNativeCore +[GoNativeAppConfig sharedAppConfig]
(then UINib / UIStoryboard main interface load)

The exception originates inside GoNativeAppConfig processConfig when calling removeObjectForKey: on a mutable dictionary, during setupFromJsonFiles at the very start of launch.

What I have already ruled out on my side:

Screen Orientation is set to Auto Rotate for both iPhone and iPad (not empty).
I disabled the OneSignal native plugin entirely and rebuilt — the app STILL crashes on launch in the simulator, so this is not push/OneSignal related.

The Android build (package hu.bcbb.app) works fine on the Play Store with the same web app, so this is iOS-specific.

Since the crash is inside your native GoNativeAppConfig layer and not in my web content (which never loads), could you please:

Check whether build 39's native runtime is fully compatible with iOS 26.5, and
Identify which config key is causing the removeObjectForKey: exception in processConfig.

I can provide the full .ips crash logs (I have two, both identical) and my appConfig.json on request. Thank you for the help.

Best regards,
Csaba