IOS Web thread se detuvo al usar webSocket en UiWebView

Mi aplicación se bloqueó cuando conecté mi vista web con WebSockets, el error es

thread #7: tid = 0x0f3a, 0x2dd28894 CoreFoundation`CFRelease + 1132, name = 'WebThread, stop reason = EXC_BREAKPOINT (code=EXC_ARM_BREAKPOINT, subcode=0xdefe) frame #0: 0x2dd28894 CoreFoundation`CFRelease + 1132 frame #1: 0x2ddc1d02 CoreFoundation`__CFRunLoopTimerDeallocate + 26 frame #2: 0x2dd285f6 CoreFoundation`CFRelease + 462 frame #3: 0x2dda0e70 CoreFoundation`__CFArrayReleaseValues + 192 frame #4: 0x2dd285f6 CoreFoundation`CFRelease + 462 frame #5: 0x2ddc10b0 CoreFoundation`__CFRunLoopRun + 1240 frame #6: 0x2dd2bc26 CoreFoundation`CFRunLoopRunSpecific + 522 frame #7: 0x2dd2ba0a CoreFoundation`CFRunLoopRunInMode + 106 frame #8: 0x35cb226a WebCore`RunWebThread(void*) + 418 frame #9: 0x3885fc1c libsystem_pthread.dylib`_pthread_body + 140 frame #10: 0x3885fb8e libsystem_pthread.dylib`_pthread_start + 102 frame #11: 0x3885dc90 libsystem_pthread.dylib`thread_start + 8 

El mismo crash aquí:

 Thread 4 WebThread, Queue : (null) #0 0x020020af in CFRelease () #1 0x05fc33eb in WebCore::stopShanetworkingTimer() () #2 0x06173cd0 in WebCore::ThreadTimers::updateShanetworkingTimer() () #3 0x0618c33e in WebCore::TimerBase::setNextFireTime(double) () #4 0x0618c284 in WebCore::TimerBase::start(double, double) () #5 0x05387ee7 in WebCore::DeferrableOneShotTimer<WebCore::CachedResource>::finetworking() () #6 0x06173da0 in WebCore::ThreadTimers::shanetworkingTimerFinetworkingInternal() () #7 0x06173c36 in WebCore::ThreadTimers::shanetworkingTimerFinetworking() () #8 0x05fc338b in WebCore::timerFinetworking(__CFRunLoopTimer*, void*) () #9 0x0203eac6 in __CFRUNLOOP_IS_CALLING_OUT_TO_A_TIMER_CALLBACK_FUNCTION__ () #10 0x0203e4ad in __CFRunLoopDoTimer () #11 0x02026538 in __CFRunLoopRun () #12 0x020259d3 in CFRunLoopRunSpecific () #13 0x020257eb in CFRunLoopRunInMode () #14 0x061d5e40 in RunWebThread(void*) () #15 0x033905fb in _pthread_body () #16 0x03390485 in _pthread_start () 

Parece ser un post de lanzamiento CFRunLoopTimer que se envía a una instancia desasignada.