how to resolve app crash in AXSpeechManager for iOS 14.5

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I recently met a weird crash which only appears in iOS 14.5 and iOS 14.5.1, which I cannot reproduce.

But the crash log only contains code from the system framework, it did contain any code from my app, does anybody know why? Any infomation will be appreciated. Below is the stacktrace, “TaxiDriverOwner” is my project name.

Date/Time:           2022-04-06 15:20:45.2457 +0800
Launch Time:         2022-04-06 15:15:54.6033 +0800
OS Version:          iPhone OS 14.5.1 (18E212)
Release Type:        User
Baseband Version:    1.62.11
Report Version:      104

Exception Type:  EXC_CRASH (SIGABRT)
Exception Codes: 0x0000000000000000, 0x0000000000000000
Exception Note:  EXC_CORPSE_NOTIFY
Triggered by Thread:  0

Thread 0 name:
Thread 0 Crashed:
0   libsystem_kernel.dylib          0x00000001c9be9334 __pthread_kill + 8
1   libsystem_pthread.dylib         0x00000001e760daa0 pthread_kill + 272 (pthread.c:1392)
2   libsystem_c.dylib               0x00000001a4e56b90 abort + 104 (abort.c:110)
3   libsystem_c.dylib               0x00000001a4e56024 __assert_rtn + 292 (assert.c:96)
4   libAXSpeechManager.dylib        0x00000001c8253df8 -[AXSpeechManager _updateAuxiliarySession].cold.2 + 44 (AXSpeechManager.m:360)
5   libAXSpeechManager.dylib        0x00000001c824a070 -[AXSpeechManager _updateAuxiliarySession] + 1672 (AXSpeechManager.m:360)
6   libAXSpeechManager.dylib        0x00000001c824a60c -[AXSpeechManager _handleMediaServicesWereLost:] + 96 (AXSpeechManager.m:517)
7   CoreFoundation                  0x000000019ba31534 __CFNOTIFICATIONCENTER_IS_CALLING_OUT_TO_AN_OBSERVER__ + 28 (CFNotificationCenter.c:706)
8   CoreFoundation                  0x000000019ba314dc ___CFXRegistrationPost_block_invoke + 52 (CFNotificationCenter.c:173)
9   CoreFoundation                  0x000000019ba30a48 _CFXRegistrationPost + 440 (CFNotificationCenter.c:198)
10  CoreFoundation                  0x000000019ba30408 _CFXNotificationPost + 716 (CFNotificationCenter.c:1071)
11  Foundation                      0x000000019cd2867c -[NSNotificationCenter postNotificationName:object:userInfo:] + 64 (NSNotification.m:575)
12  AudioSession                    0x00000001a34c4718 -[AVAudioSession privateHandleServerDied] + 196 (AVAudioSession_iOS.mm:2871)
13  AudioSession                    0x00000001a34bdaf0 (anonymous namespace)::HandlePropertyListenerCallback(unsigned int, objc_selector*) + 60 (AVAudioSession_iOS.mm:255)
14  libdispatch.dylib               0x000000019b6c1a54 _dispatch_call_block_and_release + 32 (init.c:1466)
15  libdispatch.dylib               0x000000019b6c37ec _dispatch_client_callout + 20 (object.m:559)
16  libdispatch.dylib               0x000000019b6d1c40 _dispatch_main_queue_callback_4CF + 884 (inline_internal.h:2557)
17  CoreFoundation                  0x000000019ba501f8 __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 16 (CFRunLoop.c:1790)
18  CoreFoundation                  0x000000019ba4a0d0 __CFRunLoopRun + 2524 (CFRunLoop.c:3118)
19  CoreFoundation                  0x000000019ba491c0 CFRunLoopRunSpecific + 600 (CFRunLoop.c:3242)
20  GraphicsServices                0x00000001b3031734 GSEventRunModal + 164 (GSEvent.c:2259)
21  UIKitCore                       0x000000019e4b77e4 -[UIApplication _run] + 1072 (UIApplication.m:3269)
22  UIKitCore                       0x000000019e4bd054 UIApplicationMain + 168 (UIApplication.m:4740)
23  TaxiDriverOwner                 0x00000001002228a0 main + 68 (AppDelegate.swift:17)
24  libdyld.dylib                   0x000000019b705cf8 start + 4

Thread 1 name:
Thread 1:
0   libsystem_kernel.dylib          0x00000001c9bc44fc mach_msg_trap + 8
1   libsystem_kernel.dylib          0x00000001c9bc3884 mach_msg + 76 (mach_msg.c:103)
2   CoreFoundation                  0x000000019ba4fd10 __CFRunLoopServiceMachPort + 372 (CFRunLoop.c:2641)
3   CoreFoundation                  0x000000019ba49bb0 __CFRunLoopRun + 1212 (CFRunLoop.c:2974)
4   CoreFoundation                  0x000000019ba491c0 CFRunLoopRunSpecific + 600 (CFRunLoop.c:3242)
5   Foundation                      0x000000019cd29fac -[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 232 (NSRunLoop.m:377)
6   Foundation                      0x000000019cd29e78 -[NSRunLoop(NSRunLoop) runUntilDate:] + 92 (NSRunLoop.m:424)
7   UIKitCore                       0x000000019e56c38c -[UIEventFetcher threadMain] + 516 (UIEventFetcher.m:929)
8   Foundation                      0x000000019ce9b2fc __NSThread__start__ + 864 (NSThread.m:724)
9   libsystem_pthread.dylib         0x00000001e760cc00 _pthread_start + 320 (pthread.c:881)
10  libsystem_pthread.dylib         0x00000001e7615758 thread_start + 8

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