IOS 8 crashing in a weird pattern

I've spent over a thousand hours on the app, it works great on iOS 7, both on the device and on the simulator. When I run it on iOS 8 it works great on the simulator. But for some reason, when I run it on my iOS 8 device, it starts to crash strangely. If I implement CLLocation, the application runs smoothly for the first 5 times I run it. Then it crashes MOMENT I will compile it for the next 5 times. After doing this 5 times, it starts compiling again. Then, 5 more times, it runs again on startup and the pattern continues. IE. 1, run. 2. run. 3. run. 4. run. 5. run. 6-10. Startup crash, 11-15, startup. Accident 16-20

HOWEVER, when I remove CLLocation, the application runs smoothly, but it crashes every third launch. IE. 1. run. 2. run. 3. Accident. 4. run. 5. run 6. crash.

I banged my head against the wall like days without sleep. Can someone explain to me why? For each startup failure, the only console outputs error is the NSDictionary unknown selector.

I don't want my app to be rejected if Apple reviewers run it at one of the "crash times"

Console Bt

(lldb) bt
* thread #3: tid = 0x12646, 0x00000001983640a8 libobjc.A.dylib`objc_exception_throw, queue = 'com.apple.root.default-qos', stop reason = breakpoint 1.1
    frame #0: 0x00000001983640a8 libobjc.A.dylib`objc_exception_throw
    frame #1: 0x0000000187d8d094 CoreFoundation`-[NSObject(NSObject) doesNotRecognizeSelector:] + 220
    frame #2: 0x0000000187d89e48 CoreFoundation`___forwarding___ + 928
    frame #3: 0x0000000187c8f08c CoreFoundation`_CF_forwarding_prep_0 + 92
    frame #4: 0x0000000188c4f0dc Foundation`-[NSString getExternalRepresentation:extendedAttributes:forWritingToURLOrPath:usingEncoding:error:] + 192
    frame #5: 0x0000000188c4f23c Foundation`writeStringToURLOrPath + 72
  * frame #6: 0x00000001000c9f1c Blurtalk`+[PFInternalUtils installationId](self=<unavailable>, _cmd=<unavailable>) + 340 at PFInternalUtils.m:307
    frame #7: 0x00000001000f0a94 Blurtalk`+[PFNetworkCommandRunner createRequest:](self=0x000000010027d1b8, _cmd=<unavailable>, command=0x0000000170056a70) + 268 at PFNetworkCommandRunner.m:61
    frame #8: 0x00000001000f1044 Blurtalk`+[PFNetworkCommandRunner runCommandAsync:inOperation:](self=0x000000010027d1b8, _cmd=<unavailable>, command=<unavailable>, operation=<unavailable>) + 196 at PFNetworkCommandRunner.m:132
    frame #9: 0x00000001000f1748 Blurtalk`+[PFRetryingCommandRunner runCommandAsync:inOperation:attemptsMade:delay:](self=<unavailable>, _cmd=<unavailable>, command=<unavailable>, operation=<unavailable>, attemptsMade=1, delay=<unavailable>) + 92 at PFRetryingCommandRunner.m:42
    frame #10: 0x00000001000f16bc Blurtalk`+[PFRetryingCommandRunner runCommandAsync:inOperation:](self=<unavailable>, _cmd=<unavailable>, command=<unavailable>, operation=<unavailable>) + 124 at PFRetryingCommandRunner.m:35
    frame #11: 0x00000001000f1f80 Blurtalk`+[PFCachedCommandRunner runCommandAsync:inOperation:cachePolicy:maxCacheAge:](self=<unavailable>, _cmd=<unavailable>, command=<unavailable>, operation=<unavailable>, cachePolicy=<unavailable>, maxCacheAge=<unavailable>) + 240 at PFCachedCommandRunner.m:82
    frame #12: 0x000000010009dcd8 Blurtalk`__48-[BFTask continueWithExecutor:withSuccessBlock:]_block_invoke(.block_descriptor=0x0000000170241e60, task=<unavailable>) + 200 at BFTask.m:335
    frame #13: 0x000000010009d730 Blurtalk`__41-[BFTask continueWithExecutor:withBlock:]_block_invoke_2(.block_descriptor=0x000000017807a340) + 32 at BFTask.m:287
    frame #14: 0x0000000100338f20 libdispatch.dylib`_dispatch_call_block_and_release + 24
    frame #15: 0x0000000100338ee0 libdispatch.dylib`_dispatch_client_callout + 16
    frame #16: 0x00000001003459a0 libdispatch.dylib`_dispatch_root_queue_drain + 1272
    frame #17: 0x0000000100346f18 libdispatch.dylib`_dispatch_worker_thread3 + 132
    frame #18: 0x0000000198b852e4 libsystem_pthread.dylib`_pthread_wqthread + 816