We are encountering a critical issue where an enterprise-signed iOS app crashes immediately after installation on devices running iOS 18.3.2 (22D82). The same app runs fine on other iOS versions (including iOS 18.3.1 and earlier). Issue Summary: After upgrading to iOS 18.3.2, users are unable to launch our enterprise app (Bundle ID: com.kt.MobileDRM). The app installs successfully but crashes immediately upon launch. This issue occurs only on iOS 18.3.2, not on earlier versions or other iPadOS/iOS devices. System Log Snippet: SecKeyVerifySignature failed: Error Domain=NSOSStatusErrorDomain Code=-50 "rsa_pub_crypt failed, ccerr=-7" UserInfo={numberOfErrorsDeep=0, NSDescription=rsa_pub_crypt failed, ccerr=-7} Additional Info: The app is signed with a valid enterprise certificate. No changes were made to the app binary or signing configuration before this issue started. We are not using an IPS file. A similar app (different bundle ID) shows the same behavior on iPadOS 18.3.2 but runs fine on other versions. Questions: Has there been a change in iOS 18.3.2 that affects enterprise certificate validation? Does ccerr=-7 indicate a cryptographic change or stricter signature verification? Are there updated requirements or provisioning profile constraints we should be aware of for iOS 18.3.2? We would greatly appreciate any insights or official guidance regarding this issue. Thank you!

Hi, I run a midsize business. Apple recommends for company owned devices and for other reasons to use Apple Business managed Apple IDs for the employees. After that, you have to use a MDM System for e.g. deploying apps and licenses. Testflight is an app that can be deployed too. But....Testflight can not more than to say "Hello" on a managed device. The use of Testflight and to test our developed apps is not possible with a managed ID. Can anyone explain to me this thinking or what is recommended than. Setting up a private Apple ID for that purpose...which on the other hand, Apple do not want or does not recommend.