App crash when resume from background - ios

Question

My app sometimes crash if it has been in the background for a while and I bring it back into the foreground. I would much appreciate any help on the matter. The log say that the crash is triggered by tread 5. It seems to have something to do with resuming the Meteor session. using a token?
Any help would be very much appreciated. Thank You !
Hardware Model: iPhone7,2
Process: MyApp [1971]
Path: /private/var/mobile/Containers/Bundle/Application/801F312F-A114-4EBC-81B3-5DDC8AEA76BC/MyApp.app/MyApp
Identifier: MyApp
Version: 4 (1)
Code Type: ARM-64 (Native)
Parent Process: launchd [1]
Date/Time: 2016-03-30 18:59:31.31 +0200
Launch Time: 2016-03-30 18:41:24.24 +0200
OS Version: iOS 9.0.2 (13A452)
Report Version: 105
Exception Type: EXC_CRASH (SIGABRT)
Exception Codes: 0x0000000000000000, 0x0000000000000000
Exception Note: EXC_CORPSE_NOTIFY
Triggered by Thread: 5
Filtered syslog:
None found
Last Exception Backtrace:
0 CoreFoundation 0x182464f5c __exceptionPreprocess + 124
1 libobjc.A.dylib 0x19705bf80 objc_exception_throw + 56
2 CoreFoundation 0x182464e2c +[NSException raise:format:arguments:] + 108
3 Foundation 0x183353f3c -[NSAssertionHandler handleFailureInMethod:object:file:lineNumber:description:] + 112
4 Meteor 0x100b3c910 -[METDDPConnection sendMessage:] (METDDPConnection.m:72)
5 Meteor 0x100b36f18 -[METDDPClient sendMessage:] (METDDPClient.m:275)
6 Meteor 0x100b3a40c -[METDDPClient sendMethodMessageForMethodInvocation:] (METDDPClient.m:609)
7 Meteor 0x100b4ccb0 -[METMethodInvocation start] (METMethodInvocation.m:81)
8 Foundation 0x183389c20 __NSOQSchedule_f + 224
9 libdispatch.dylib 0x197855770 _dispatch_client_callout + 16
10 libdispatch.dylib 0x19786175c _dispatch_queue_drain + 864
11 libdispatch.dylib 0x197859274 _dispatch_queue_invoke + 464
12 libdispatch.dylib 0x19786362c _dispatch_root_queue_drain + 728
13 libdispatch.dylib 0x19786334c _dispatch_worker_thread3 + 112
14 libsystem_pthread.dylib 0x197a69478 _pthread_wqthread + 1092
15 libsystem_pthread.dylib 0x197a69028 start_wqthread + 4
Global Trace Buffer (reverse chronological seconds):
412.483308 CFNetwork 0x0000000181b699a4 TCP Conn 0x12f667c10 SSL Handshake DONE
412.625113 CFNetwork 0x0000000181b698b4 TCP Conn 0x12f667c10 starting SSL negotiation
412.625906 CFNetwork 0x0000000181c0b760 TCP Conn 0x12f667c10 complete. fd: 6, err: 0
412.625907 CFNetwork 0x0000000181c0cc8c TCP Conn 0x12f667c10 event 1. err: 0
Thread 0 name: Dispatch queue: com.apple.main-thread
Thread 0:
0 libobjc.A.dylib 0x000000019706da6c weak_read_no_lock + 44
1 libobjc.A.dylib 0x000000019706da60 weak_read_no_lock + 32
2 libobjc.A.dylib 0x0000000197074984 objc_loadWeakRetained + 108
3 UIKit 0x00000001879fb6a4 -[UITextSelectionView interactionAssistant] + 24
4 UIKit 0x0000000187a025dc -[UITextSelectionView updateSelectionRects] + 128
5 UIKit 0x0000000187a02524 -[UITextSelectionView updateSelectionRectsIfNeeded] + 84
6 UIKit 0x0000000187f325f4 __51-[UITextSelectionView deferredUpdateSelectionRects]_block_invoke + 36
7 CoreFoundation 0x000000018241bc30 __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 32
8 CoreFoundation 0x00000001824199d4 __CFRunLoopDoObservers + 372
9 CoreFoundation 0x0000000182419d1c __CFRunLoopRun + 696
10 CoreFoundation 0x0000000182348dc0 CFRunLoopRunSpecific + 384
11 GraphicsServices 0x000000018d49c088 GSEventRunModal + 180
12 UIKit 0x0000000187a22f44 UIApplicationMain + 204
13 MyApp 0x000000010016582c 0x1000b8000 + 710700
14 libdyld.dylib 0x00000001978868b8 start + 4
Thread 1 name: Dispatch queue: com.apple.libdispatch-manager
Thread 1:
0 libsystem_kernel.dylib 0x00000001979a459c kevent_qos + 8
1 libdispatch.dylib 0x0000000197868a04 _dispatch_mgr_invoke + 232
2 libdispatch.dylib 0x000000019785793c _dispatch_source_invoke + 0
Thread 2:
0 libsystem_kernel.dylib 0x0000000197988c30 mach_msg_trap + 8
1 libsystem_kernel.dylib 0x0000000197988aac mach_msg + 72
2 CoreFoundation 0x000000018241c168 __CFRunLoopServiceMachPort + 196
3 CoreFoundation 0x0000000182419e6c __CFRunLoopRun + 1032
4 CoreFoundation 0x0000000182348dc0 CFRunLoopRunSpecific + 384
5 Foundation 0x00000001832bc7ec -[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 308
6 PocketSocket 0x0000000100bba2b4 -[PSWebSocketNetworkThread main] (PSWebSocketNetworkThread.m:64)
7 Foundation 0x00000001833a3138 __NSThread__start__ + 1000
8 libsystem_pthread.dylib 0x0000000197a6bb3c _pthread_body + 156
9 libsystem_pthread.dylib 0x0000000197a6baa0 _pthread_body + 0
10 libsystem_pthread.dylib 0x0000000197a69030 thread_start + 4
Thread 3 name: com.apple.NSURLConnectionLoader
Thread 3:
0 libsystem_kernel.dylib 0x0000000197988c30 mach_msg_trap + 8
1 libsystem_kernel.dylib 0x0000000197988aac mach_msg + 72
2 CoreFoundation 0x000000018241c168 __CFRunLoopServiceMachPort + 196
3 CoreFoundation 0x0000000182419e6c __CFRunLoopRun + 1032
4 CoreFoundation 0x0000000182348dc0 CFRunLoopRunSpecific + 384
5 CFNetwork 0x0000000181be6074 +[NSURLConnection(Loader) _resourceLoadLoop:] + 412
6 Foundation 0x00000001833a3138 __NSThread__start__ + 1000
7 libsystem_pthread.dylib 0x0000000197a6bb3c _pthread_body + 156
8 libsystem_pthread.dylib 0x0000000197a6baa0 _pthread_body + 0
9 libsystem_pthread.dylib 0x0000000197a69030 thread_start + 4
Thread 4 name: com.apple.CFSocket.private
Thread 4:
0 libsystem_kernel.dylib 0x00000001979a3408 __select + 8
1 CoreFoundation 0x00000001824226d0 __CFSocketManager + 648
2 libsystem_pthread.dylib 0x0000000197a6bb3c _pthread_body + 156
3 libsystem_pthread.dylib 0x0000000197a6baa0 _pthread_body + 0
4 libsystem_pthread.dylib 0x0000000197a69030 thread_start + 4
Thread 5 name: Dispatch queue: NSOperationQueue 0x12f57ff00 :: login((
{
resume = "dLJOlefqcSP3c8jFB6J4l_ZEnN6l_5UxpAlo1gUYBas";
}
)) (QOS
Thread 5 Crashed:
0 libsystem_kernel.dylib 0x00000001979a31e0 __pthread_kill + 8
1 libsystem_pthread.dylib 0x0000000197a6cf0c pthread_kill + 112
2 libsystem_c.dylib 0x0000000197916b78 abort + 140
3 libc++abi.dylib 0x00000001966d93f4 __cxa_bad_cast + 0
4 libc++abi.dylib 0x00000001966f5e98 default_unexpected_handler() + 0
5 libobjc.A.dylib 0x000000019705c248 _objc_terminate() + 124
6 libc++abi.dylib 0x00000001966f2f44 std::__terminate(void (*)()) + 16
7 libc++abi.dylib 0x00000001966f2fd0 std::set_new_handler(void (*)()) + 0
8 libobjc.A.dylib 0x000000019705c1a4 _destroyAltHandlerList + 0
9 libdispatch.dylib 0x0000000197855784 _dispatch_client_callout + 36
10 libdispatch.dylib 0x000000019786175c _dispatch_queue_drain + 864
11 libdispatch.dylib 0x0000000197859274 _dispatch_queue_invoke + 464
12 libdispatch.dylib 0x000000019786362c _dispatch_root_queue_drain + 728
13 libdispatch.dylib 0x000000019786334c _dispatch_worker_thread3 + 112
14 libsystem_pthread.dylib 0x0000000197a69478 _pthread_wqthread + 1092
15 libsystem_pthread.dylib 0x0000000197a69028 start_wqthread + 4**
Thread 6:
0 libsystem_kernel.dylib 0x00000001979a3c0c __workq_kernreturn + 8
1 libsystem_pthread.dylib 0x0000000197a69538 _pthread_wqthread + 1284
2 libsystem_pthread.dylib 0x0000000197a69028 start_wqthread + 4
Thread 7:
0 libsystem_kernel.dylib 0x00000001979a3c0c __workq_kernreturn + 8
1 libsystem_pthread.dylib 0x0000000197a69538 _pthread_wqthread + 1284
2 libsystem_pthread.dylib 0x0000000197a69028 start_wqthread + 4
Thread 8:
0 libsystem_kernel.dylib 0x00000001979a3c0c __workq_kernreturn + 8
1 libsystem_pthread.dylib 0x0000000197a69538 _pthread_wqthread + 1284
2 libsystem_pthread.dylib 0x0000000197a69028 start_wqthread + 4
Thread 9:
0 libsystem_kernel.dylib 0x00000001979a3c0c __workq_kernreturn + 8
1 libsystem_pthread.dylib 0x0000000197a69538 _pthread_wqthread + 1284
2 libsystem_pthread.dylib 0x0000000197a69028 start_wqthread + 4
Thread 10:
0 libsystem_kernel.dylib 0x00000001979a3c0c __workq_kernreturn + 8
1 libsystem_pthread.dylib 0x0000000197a69538 _pthread_wqthread + 1284
2 libsystem_pthread.dylib 0x0000000197a69028 start_wqthread + 4
Thread 11:
0 libsystem_kernel.dylib 0x00000001979a3c0c __workq_kernreturn + 8
1 libsystem_pthread.dylib 0x0000000197a69538 _pthread_wqthread + 1284
2 libsystem_pthread.dylib 0x0000000197a69028 start_wqthread + 4
Thread 12:
0 libsystem_kernel.dylib 0x00000001979a3c0c __workq_kernreturn + 8
1 libsystem_pthread.dylib 0x0000000197a69538 _pthread_wqthread + 1284
2 libsystem_pthread.dylib 0x0000000197a69028 start_wqthread + 4
Thread 13:
0 libsystem_kernel.dylib 0x00000001979a3c0c __workq_kernreturn + 8
1 libsystem_pthread.dylib 0x0000000197a69538 _pthread_wqthread + 1284
2 libsystem_pthread.dylib 0x0000000197a69028 start_wqthread + 4
Thread 14:
0 libsystem_kernel.dylib 0x00000001979a3c0c __workq_kernreturn + 8
1 libsystem_pthread.dylib 0x0000000197a69538 _pthread_wqthread + 1284
2 libsystem_pthread.dylib 0x0000000197a69028 start_wqthread + 4
Thread 15:
0 libsystem_kernel.dylib 0x00000001979a3c0c __workq_kernreturn + 8
1 libsystem_pthread.dylib 0x0000000197a69538 _pthread_wqthread + 1284
2 libsystem_pthread.dylib 0x0000000197a69028 start_wqthread + 4