Hi， Apps crashed when enter foreground and want to connect with server，since iOS 14.5 released on April 27。 Crash stack like this： Monitor Type: Mach Exception Exception Type: EXC_BAD_ACCESS (SIGSEGV) Exception Codes: KERN_INVALID_ADDRESS at 0x0000000000000010 Crashed Thread: 40 Pthread id: 867350 Thread 40 Crashed: 0 libnetwork.dylib nw_endpoint_flow_copy_path + 44 1 libnetwork.dylib nw_endpoint_flow_copy_path + 40 2 libnetwork.dylib nw_endpoint_flow_connected + 320 3 libnetwork.dylib nw_flow_connected + 3668 4 libnetwork.dylib nw_socket_connect + 584 5 libnetwork.dylib nw_endpoint_flow_connect + 164 6 libnetwork.dylib nw_endpoint_flow_setup_protocols + 3272 7 libnetwork.dylib -[NWConcrete_nw_endpoint_flow startWithHandler:] + 3616 8 libnetwork.dylib nw_endpoint_handler_path_change + 10592 9 libnetwork.dylib nw_endpoint_handler_start + 1184 10 libnetwork.dylib __nw_connection_start_block_invoke + 1460 11 imeituan __innerBlockOnce_block_invoke (SCRCrashMonitor_GCD.mm:191) 12 libdispatch.dylib _dispatch_call_block_and_release + 32 13 libdispatch.dylib _dispatch_client_callout + 20 14 libdispatch.dylib _dispatch_lane_serial_drain + 620 15 libdispatch.dylib _dispatch_lane_invoke + 456 16 libdispatch.dylib _dispatch_workloop_invoke + 1680 17 libdispatch.dylib _dispatch_workloop_worker_thread + 764 18 libsystem_pthread.dylib _pthread_wqthread + 276 Enqueue thread backtrace: 0 imeituan innerBlockOnce (SCRCrashMonitor_GCD.mm:0) 1 imeituan _dispatch_async (SCRCrashMonitor_GCD.mm:0) 2 libnetwork.dylib nw_connection_start + 280 3 libnetwork.dylib tcp_connection_start + 1496 4 CFNetwork 0x0000000180b7c3bc + 168 5 CFNetwork 0x0000000180b79b80 + 2776 6 CFNetwork 0x0000000180b77918 + 1724 7 CoreFoundation _CFStreamOpen + 140 8 imeituan -[GCDAsyncSocket openStreams] (GCDAsyncSocket.m:6998) 9 imeituan __29-[GCDAsyncSocket didConnect:]_block_invoke330 (GCDAsyncSocket.m:2369) 10 imeituan __29-[GCDAsyncSocket didConnect:]_block_invoke_2 (GCDAsyncSocket.m:2396) 11 imeituan __innerBlockOnce_block_invoke (SCRCrashMonitor_GCD.mm:191) 12 libdispatch.dylib _dispatch_call_block_and_release + 32 13 libdispatch.dylib _dispatch_client_callout + 20 14 libdispatch.dylib _dispatch_lane_serial_drain + 620 15 libdispatch.dylib _dispatch_lane_invoke + 404 16 libdispatch.dylib _dispatch_workloop_worker_thread + 764 17 libsystem_pthread.dylib _pthread_wqthread + 276 18 libsystem_pthread.dylib start_wqthread + 8