iOS SDK로 로그인시 크래시 현상

iOS SDK를 이용하여 카카오톡 로그인을 구현했습니다.
xcode 빌드(run) 테스트는 문제없이 잘 구동되고 있지만 (프로필 가져오기),
앱을 itunesconnect로 빌드하여 스토어에서 다운로드 받으면 다음과 같은 크래시가 발생합니다.
혹시 원인을 알고 계신 분이 있나요?

-[KOURLConnection connectionDidFinishLoading:]
__25-[KOSessionTask callAPI:]_block_invoke.63
__92+[KOSessionTask(UserManagementAPI) meTaskWithSecureResource:propertyKeys:completionHandler:]_block_invoke
partial apply for ViewController.(loginKakao() → ()).(closure #1).(closure #1)
specialized ViewController.(loginKakao() → ()).(closure #1).(closure #1)
→ 크래시 발생

@ranigga
붙여주신 로그 앞부분도 확인 가능할까요?

CFNetwork __65-[NSURLConnectionInternal _withConnectionAndDelegate:onlyActive:]_block_invoke + 60
CFNetwork -[NSURLConnectionInternal _withConnectionAndDelegate:onlyActive:] + 200
CFNetwork -[NSURLConnectionInternal _withActiveConnectionAndDelegate:] + 56
CFNetwork ___ZN27URLConnectionClient_Classic26_delegate_didFinishLoadingEU13block_pointerFvvE_block_invoke + 96
CFNetwork ___ZN27URLConnectionClient_Classic18_withDelegateAsyncEPKcU13block_pointerFvP16_CFURLConnectionPK33CFURLConnectionClientCurrent_VMaxE_block_invoke_2 + 108
libdispatch.dylib _dispatch_client_callout + 16
libdispatch.dylib _dispatch_block_invoke_direct + 332
CFNetwork RunloopBlockContext::_invoke_block(void const*, void*) + 36
CoreFoundation CFArrayApplyFunction + 68
CFNetwork RunloopBlockContext::perform() + 128
CFNetwork MultiplexerSource::perform() + 312
CFNetwork MultiplexerSource::_perform(void*) + 64
CoreFoundation CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION + 24
CoreFoundation __CFRunLoopDoSources0 + 540
CoreFoundation __CFRunLoopRun + 744
CoreFoundation CFRunLoopRunSpecific + 424
GraphicsServices GSEventRunModal + 100
UIKit UIApplicationMain + 208

@ranigga
정확한 원인을 파악하기에는 정보가 좀 부족한데
https://stackoverflow.com/questions/26069850/ios-app-crashes-only-in-ad-hoc-with-nsurlconnection
이 이슈와 연관이 있지 않을까 추측해보고 있어요
개선될 여지가 있는부분 최대한 개선하도록 하겠습니다.