My app Crashes in Testflight on iOS 13+ Only

Question

I recently submitted an app to Tesflight for test, the app work fine for iOS 12 but consistently crashes at the same place for iOS 13.6.1.

The app is in Testflight and is compiled with Xcode 11.5

Can anyone help me to solve this problem?

this is crash log can anyone make a suggestion on what's going wrong?

Incident Identifier: A516654B-34B8-411D-B6D5-12BEC3B9D2CE
Hardware Model:      iPhone9,3
Process:             ********* [3921]
Path:                /private/var/containers/Bundle/Application/******
Identifier:          com.*****
Version:             3 (1.0.1)
AppStoreTools:       11E801a
AppVariant:          1:iPhone9,3:13
Beta:                YES
Code Type:           ARM-64 (Native)
Role:                Foreground
Parent Process:      launchd [1]
Coalition:           com.******* [1594]


Date/Time:           2020-08-29 20:30:02.3612 +0200
Launch Time:         2020-08-29 20:29:50.4227 +0200
OS Version:          iPhone OS 13.6.1 (17G80)
Release Type:        User
Baseband Version:    4.03.00
Report Version:      104

Exception Type:  EXC_CRASH (SIGABRT)
Exception Codes: 0x0000000000000000, 0x0000000000000000
Exception Note:  EXC_CORPSE_NOTIFY
Triggered by Thread:  2

Last Exception Backtrace:
0   CoreFoundation                  0x199c79654 __exceptionPreprocess + 224 (NSException.m:199)
1   libobjc.A.dylib                 0x19999bbcc objc_exception_throw + 56 (objc-exception.mm:565)
2   CoreFoundation                  0x199b7c6ec +[NSException raise:format:arguments:] + 96 (NSException.m:146)
3   Foundation                      0x199fc216c -[NSAssertionHandler handleFailureInMethod:object:file:lineNumber:description:] + 128 (NSException.m:231)
4   FrontBoardServices              0x19ee48e84 -[FBSSerialQueue assertOnQueue] + 228 (FBSSerialQueue.m:98)
5   FrontBoardServices              0x19edfed88 -[FBSSceneImpl updateClientSettings:withTransitionContext:] + 76 (FBSSceneImpl.m:190)
6   FrontBoardServices              0x19edfefe8 -[FBSSceneImpl updateClientSettingsWithTransitionBlock:] + 152 (FBSSceneImpl.m:213)
7   FrontBoardServices              0x19edfeef8 -[FBSSceneImpl updateClientSettingsWithBlock:] + 112 (FBSSceneImpl.m:203)
8   UIKitCore                       0x19d8a46c0 -[FBSScene(UIApp) updateUIClientSettingsWithBlock:] + 168 (FBSScene+UIApp.m:41)
9   UIKitCore                       0x19dd3c448 -[UIApplication setProximityEventsEnabled:] + 108 (UIApplication.m:9203)
10  UIKitCore                       0x19d99cd50 -[UIDevice setProximityMonitoringEnabled:] + 112 (UIDevice.m:890)
11  ***                 0x100276cec -[ProximityHelper startProximitySensor] + 100 (ProximityHelper.m:53)
12 ***                  0x10025347c -[RecordSound performRecord:] + 656 (RecordSound.m:172)
13 ***                  0x10009c180 -[SoundRecordManager startCalibrationRecord:] + 200 (SoundRecordManager.m:65)
14  CoreFoundation                  0x199c7f8c0 __invoking___ + 144
15  CoreFoundation                  0x199b50a70 -[NSInvocation invoke] + 300 (NSForwarding.m:3312)
16  CoreFoundation                  0x199b51648 -[NSInvocation invokeWithTarget:] + 76 (NSForwarding.m:3418)
17  ****                    0x10015bef0 -[RCTModuleMethod invokeWithBridge:module:arguments:] + 460 (RCTModuleMethod.mm:584)
18  ****                    0x10015dfdc facebook::react::invokeInner(RCTBridge*, RCTModuleData*, unsigned int, folly::dynamic const&) + 244 (RCTNativeModule.mm:114)
19  ****                    0x10015dd40 operator() + 44 (RCTNativeModule.mm:75)
20  ****                    0x10015dd40 invocation function for block in facebook::react::RCTNativeModule::invoke(unsigned int, folly::dynamic&&, int) + 88 (RCTNativeModule.mm:67)
21  libdispatch.dylib               0x19993e9a8 _dispatch_call_block_and_release + 24 (init.c:1408)
22  libdispatch.dylib               0x19993f524 _dispatch_client_callout + 16 (object.m:495)
23  libdispatch.dylib               0x1998eb8a4 _dispatch_lane_serial_drain$VARIANT$mp + 608 (inline_internal.h:2484)
24  libdispatch.dylib               0x1998ec294 _dispatch_lane_invoke$VARIANT$mp + 416 (queue.c:3863)
25  libdispatch.dylib               0x1998f578c _dispatch_workloop_worker_thread + 588 (queue.c:6445)
26  libsystem_pthread.dylib         0x199990b74 _pthread_wqthread + 272 (pthread.c:2351)
27  libsystem_pthread.dylib         0x199993740 start_wqthread + 8

Thread 2 name:
Thread 2 Crashed:
0   libsystem_kernel.dylib          0x0000000199a6ed88 __pthread_kill + 8
1   libsystem_pthread.dylib         0x00000001999871e8 pthread_kill$VARIANT$mp + 136 (pthread.c:1458)
2   libsystem_c.dylib               0x00000001998da934 abort + 100 (abort.c:110)
3   libc++abi.dylib                 0x0000000199a42cc0 abort_message + 128 (abort_message.cpp:76)
4   libc++abi.dylib                 0x0000000199a34e10 demangling_terminate_handler() + 296 (cxa_default_handlers.cpp:65)
5   libobjc.A.dylib                 0x000000019999be80 _objc_terminate() + 124 (objc-exception.mm:701)
6   libc++abi.dylib                 0x0000000199a4214c std::__terminate(void (*)()) + 16 (cxa_handlers.cpp:59)
7   libc++abi.dylib                 0x0000000199a420e4 std::terminate() + 44 (cxa_handlers.cpp:88)
8   libdispatch.dylib               0x000000019993f538 _dispatch_client_callout + 36 (object.m:498)
9   libdispatch.dylib               0x00000001998eb8a4 _dispatch_lane_serial_drain$VARIANT$mp + 608 (inline_internal.h:2484)
10  libdispatch.dylib               0x00000001998ec294 _dispatch_lane_invoke$VARIANT$mp + 416 (queue.c:3863)
11  libdispatch.dylib               0x00000001998f578c _dispatch_workloop_worker_thread + 588 (queue.c:6445)
12  libsystem_pthread.dylib         0x0000000199990b74 _pthread_wqthread + 272 (pthread.c:2351)
13  libsystem_pthread.dylib         0x0000000199993740 start_wqthread + 8


Thread 2 crashed with ARM Thread State (64-bit):
    x0: 0x0000000000000000   x1: 0x0000000000000000   x2: 0x0000000000000000   x3: 0x0000000000000000
    x4: 0x0000000199a45f29   x5: 0x000000016ff0a450   x6: 0x000000000000006e   x7: 0xffffffffffffffec
    x8: 0x000000016ff0b000   x9: 0x32fb60d336d77b95  x10: 0x0000000199987160  x11: 0x000000000000000b
   x12: 0x00000001d55f9080  x13: 0x0000000000000001  x14: 0x0000000000000010  x15: 0x0000000000000004
   x16: 0x0000000000000148  x17: 0x0000000000000000  x18: 0x0000000000000000  x19: 0x0000000000000006
   x20: 0x0000000000001803  x21: 0x000000016ff0a450  x22: 0x000000016ff0b0e0  x23: 0x0000000000000000
   x24: 0x0000000000000000  x25: 0x0000000281d6a800  x26: 0x00000002826015c0  x27: 0x0000000000000000
   x28: 0x00000002826015c0   fp: 0x000000016ff0a3b0   lr: 0x00000001999871e8
    sp: 0x000000016ff0a390   pc: 0x0000000199a6ed88 cpsr: 0x40000000
   esr: 0x56000080  Address size fault

the code of proximity helper:

49 - (void) startProximitySensor {
50     if (!self.activatedByApp) return;
51     [timesChanged removeAllObjects];
52     UIDevice *device = [UIDevice currentDevice];
53     device.proximityMonitoringEnabled = YES;
54    
55   
56     [[NSNotificationCenter defaultCenter]
57      addObserver:self
58      selector:@selector(proximityChanged:)
59      name: proximityNotificationString
60      object:nil];
61 }

Answer 1

In this app version, I don't need proximity helper so I deleted his call from the library and it worked on iOS 13+