HI I have many users experiencing the following crash at app launch: Date/Time: 2023-11-09 19:10:55.3851 +0800 Launch Time: 2023-11-09 19:10:54.1307 +0800 OS Version: iPhone OS 14.6 (18F72) Release Type: User Baseband Version: 3.04.01 Report Version: 104 Exception Type: EXC_BAD_ACCESS (SIGSEGV) Exception Subtype: KERN_INVALID_ADDRESS at 0x0000000818b75160 VM Region Info: 0x818b75160 is not in any region. Bytes after previous region: 23500116321 Bytes before following region: 32871329440 REGION TYPE START - END [ VSIZE] PRT/MAX SHRMOD REGION DETAIL MALLOC_NANO 280000000-2a0000000 [512.0M] rw-/rwx SM=COW ---> GAP OF 0xd20000000 BYTES commpage (reserved) fc0000000-1000000000 [ 1.0G] ---/--- SM=NUL ...(unallocated) Termination Signal: Segmentation fault: 11 Termination Reason: Namespace SIGNAL, Code 0xb Terminating Process: exc handler [20444] Triggered by Thread: 0 Thread 0 name: Thread 0 Crashed: 0 libobjc.A.dylib 0x000000019d5d2dd0 objc_release + 16 (objc-runtime-new.h:1589) 1 CoreFoundation 0x0000000188a2567c __RELEASE_OBJECTS_IN_THE_ARRAY__ + 116 (NSCollectionAux.h:70) 2 CoreFoundation 0x00000001889e774c -[__NSArrayM dealloc] + 276 (NSArrayM.m:473) 3 libobjc.A.dylib 0x000000019d5d457c AutoreleasePoolPage::releaseUntil(objc_object**) + 204 (NSObject.mm:944) 4 libobjc.A.dylib 0x000000019d5d441c objc_autoreleasePoolPop + 212 (NSObject.mm:1211) 5 FrontBoardServices 0x00000001980af6ac -[FBSWorkspace _calloutQueue_executeCalloutFromSource:withBlock:] + 248 (FBSWorkspace.m:356) 6 FrontBoardServices 0x00000001980cba0c __94-[FBSWorkspaceScenesClient createWithSceneID:groupID:parameters:transitionContext:completion:]_block_invoke + 372 (FBSWorkspaceScenesClient.m:364) 7 libdispatch.dylib 0x00000001886fb81c _dispatch_client_callout + 20 (object.m:559) 8 libdispatch.dylib 0x00000001886ff30c _dispatch_block_invoke_direct + 268 (queue.c:468) 9 FrontBoardServices 0x00000001980f3fa0 __FBSSERIALQUEUE_IS_CALLING_OUT_TO_A_BLOCK__ + 48 (FBSSerialQueue.m:184) 10 FrontBoardServices 0x00000001980f3c30 -[FBSSerialQueue _targetQueue_performNextIfPossible] + 448 (FBSSerialQueue.m:227) 11 FrontBoardServices 0x00000001980f4184 -[FBSSerialQueue _performNextFromRunLoopSource] + 32 (FBSSerialQueue.m:258) 12 CoreFoundation 0x0000000188a889e8 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 28 (CFRunLoop.c:1967) 13 CoreFoundation 0x0000000188a888e4 __CFRunLoopDoSource0 + 208 (CFRunLoop.c:2011) 14 CoreFoundation 0x0000000188a87be8 __CFRunLoopDoSources0 + 268 (CFRunLoop.c:2048) 15 CoreFoundation 0x0000000188a81bc8 __CFRunLoopRun + 820 (CFRunLoop.c:2925) 16 CoreFoundation 0x0000000188a81360 CFRunLoopRunSpecific + 600 (CFRunLoop.c:3242) 17 GraphicsServices 0x00000001a00bf734 GSEventRunModal + 164 (GSEvent.c:2259) 18 UIKitCore 0x000000018b4fc584 -[UIApplication _run] + 1072 (UIApplication.m:3269) 19 UIKitCore 0x000000018b501df4 UIApplicationMain + 168 (UIApplication.m:4740) 20 xApp 0x0000000100ae0380 main + 128 (main.m:22) 21 libdyld.dylib 0x000000018873dcf8 start + 4 (:-1) I know that this can be a multithreading problem and it is related to NSMutableArray. But I cannot reproduce it and have no idea how to fix it. Any information will be welcome. Thanks