Critical Technical Issue: App Update Rendering iPhones Inoperative on iOS 16 Versions

Question

Created 1w

Replies 2

Boosts 0

Participants 2

We appreciate your suggestion to use the Apple Developer Forums. However, we must respectfully request further escalation of this issue beyond the forums for several critical reasons:

Severity and Scope: This is not a general development discussion topic. We are facing a massive, reproducible performance issue on iOS 16 that renders devices unresponsive, requiring factory resets or DFU restores. This goes far beyond typical app bugs and points to a potential systemic issue in the OS's image handling.

Insufficiency of Forum Support: While the forums are a valuable resource for community advice, they cannot provide the official, in-depth technical diagnosis from Apple engineers that this situation demands. Our users' devices are being bricked by an app update that passed App Review, and we require clarity on the root cause to prevent further damage and restore user trust.

Code-Level Support Eligibility: As members of the Apple Developer Program, we believe our issue falls under the purview of Code-Level Support, as described on the Apple Developer website 9. Our problem involves "building or running software" and requires expertise in Apple's frameworks and hardware-level image rendering APIs. We request that our case be forwarded to that specialized team.

To reiterate the core problem: Our update introduced 1024x1026 JPEG assets into the Asset Catalog. On iOS 16, this causes severe overheating, freezing, and device unresponsiveness. Replacing them with PNGs completely resolves the issue. This suggests a potentially serious regression in iOS 16's JPEG decoding or memory management pipeline.

We prepared to provide a sample project that demonstrates the issue if required. Our case number is 102678393572.

We urgently need to understand why this happens at the OS level to ensure our app is safe and to contribute to the stability of the iOS platform. Please escalate this case to the appropriate technical team for a detailed investigation.

Sincerely,

Boost

Answer 1

DTS Engineer OP

Apple

1w

Hello. Thanks for asking. That case number you quoted doesn't look like the kind DTS uses. Did you start a request using the following page?

https://developer.apple.com/support/technical/

Though, I don't see anything here that should require a private communication through a support request. So, for now it's probably better to keep this communication in the forums so other developers can benefit.

Can you provide more information about the APIs you are using and how you are using them? A code snippet to demonstrate what you're doing would be a good start. Or if you can provide a small focused sample that demonstrates this issue that would be even better.

Have you profiled your app using instruments to see if you can isolate any particularly processing intensive parts of your code? If so, seeing listings showing what you're doing in those parts of your app would be very useful information.

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Answer 2

ALKORiKo OP

2d

Hi We don't use the project settings only for the API. See the example

Let's repeat the main problem: in our update, 1024x1026 JPEG files have been added to the resource catalog. In iOS 16, this causes the device to seriously overheat, freeze, and refuse to respond to requests.

Can you confirm that this behavior is indeed critical for the stable operation of iOS 16?

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