Production Mendix App Crashes Instantly for One iOS User (iPhone 16 Plus) – No Logs, Works in Staging

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I am facing an issue in the Production environment of my Mendix mobile application where one specific user experiencing an instant app break immediately on launch, without reaching the login page. No error is shown to the user, and no runtime or application logs are generated in Production related to this behavior.The application uses SSO authentication, and the MX user account is created during the login flow if it does not exist. Since the app breaks before the login page loads, the login logic is never triggered and the user’s MX account is not created. All other users are able to access the application without any issues.The affected user is using an iPhone 16 Plus. We have validated that the app works fine for other users on iPhone 16 devices. The same user is also able to access the application successfully in the Staging environment. The user has tried uninstalling and reinstalling the app multiple times and tested on stable networks (both 4G and 5G), but the issue persists. Has anyone experienced a similar user‑specific or device‑specific crash before login in Mendix, especially on newer iOS devices? Any leads on possible root causes, known issues, diagnostic steps, or fixes would be greatly appreciated.
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2 answers
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Hi Neha,

Were you able to verify these if feasible?

  • Same user on another phone in Production.
  • Different user on that same 16 Plus in Production.

This would help narrow down the search base if it's a user specific or device specific behaviour.


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Hi Neha,
I had a similar issue where the app worked fine in Acceptance but crashed in Production. While it affected plenty of users in my case (not just one), here's what might help you:

I was using Mendix 10.24.9 and experienced Production crashes. I upgraded to 10.24.13 and without changing anything else, the issue was automatically resolved.

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