thx for your response. 2d66e7ae4e714b0bbb891a1d0e815830-symbolicated.crash here is a full crash file, hope it's helpful.

Thanks for your comment. Is there any place I can find the OS bug information?

Attempted to dereference null pointer. Thread 42 Crashed: 0 CFNetwork 0xfffe5be31297 CFURLResponseGetRecommendedCachePolicy 1 CFNetwork 0xfffe5bf9b800 CFHTTPCookieStorageUnscheduleFromRunLoop 2 CFNetwork 0xfffe5bfe9f3f __CFNetworkAgentMessageProcessorMain 3 CFNetwork 0xfffe5bf0af1a CFURLDownloadCancel 4 libdispatch.dylib 0xfffed0d986c3 _dispatch_call_block_and_release 5 libdispatch.dylib 0xfffed0d99657 _dispatch_client_callout 6 libdispatch.dylib 0xfffed0d9ec43 _dispatch_lane_serial_drain 7 libdispatch.dylib 0xfffed0d9f608 _dispatch_lane_invoke 8 libdispatch.dylib 0xfffed0da07ac _dispatch_workloop_invoke 9 libdispatch.dylib 0xfffed0da8c08 _dispatch_workloop_worker_thread 10 libsystem_pthread.dylib 0xfffed124da3c _pthread_wqthread 11 libsystem_pthread.dylib 0xfffed124cb76 start_wqthread