Based on my testing, it seems that the bug with .disabled() has been fixed on iOS 18.1 and 18.2. The build environment was Xcode 16.1 with Swift 5.10.

It also worked on iOS18.0

the workaround about this is forcing link order, preceding libc++abi.dylib over libc++.dylib. Thanks, After adding the following settings to Other Linker Flags, the app no longer crashes on Xcode 16.4 with iOS versions earlier than 18.4 — at least for now: -Wl,-force_load,$(SDKROOT)/usr/lib/libc++abi.tbd -Wl,-weak_library,$(SDKROOT)/usr/lib/libc++.tbd -Wl,-weak_library,$(SDKROOT)/usr/lib/libc++.1.tbd I hope this issue will be properly addressed in the next Xcode update.

Thank you for your reply. On iOS 26 official release with iPhone 16e, I found the following error in the Console log (Xcode 26 > Window → Devices and Simulators → Open Console): bgContinuedProcessing-jp.co.hikarusato.ExampleBackground.ExampleBackgroundProcess.ContinuousBackgroundTask: Foregrounded apps (<private>) don't include expected identifier: <private> On a device running iOS 26 beta (iPhone 11), the same sample project runs without this error and the BGContinuedProcessingTask works as expected. On the iPhone 16e as well, before updating to the official release of iOS 26, the BGContinuedProcessingTask was working correctly.

Thank you for your reply. It now works on iOS 26 official release (23A341)! I don’t think I changed anything (I haven’t even rebuilt the sample project), so I’m not sure under what conditions it wasn’t working before.