Chrome Version: #69.0.3455.0
OS: Windows 10 

What steps will reproduce the problem?
(1) Launched Chrome with the flag #network-service enabled
(2) Open few tabs and work for 3-4 hours.
(3) Let the machine be idle for ~40 minutes.
(4) Launch Chrome after ~40 minutes.

What is the expected result?
User should be able to use Chrome normally.

What happens instead?
Few tabs in the Chrome seems to be crashed. 
Crash ID Generated - 1bc2f81a591ee4ca

Note: 
1. Assuming this could be because of the flag #network-service enabled
2. Will update with the further observations if the issue is observed once again.
3. Also, observed that all the gmail accounts got logged out.

Stack Trace:
Thread 5 (id: 0x4478) CRASHED [EXCEPTION_ACCESS_VIOLATION_READ @ 0x00000004 ] MAGIC SIGNATURE THREAD
Stack Quality100%Show frame trust levels
0x00007ffd07f58873	(chrome_child.dll -net_adapters.cc:43 )	network::NetToMojoPendingBuffer::Complete(unsigned int)
0x00007ffd08d02e0f	(chrome_child.dll -url_loader.cc:878 )	network::URLLoader::CompletePendingWrite()
0x00007ffd08d02d94	(chrome_child.dll -url_loader.cc:740 )	network::URLLoader::DidRead(int,bool)
0x00007ffd067a4a94	(chrome_child.dll -task_annotator.cc:101 )	base::debug::TaskAnnotator::RunTask(char const *,base::PendingTask *)
0x00007ffd067a33ab	(chrome_child.dll -message_loop.cc:319 )	base::MessageLoop::RunTask(base::PendingTask *)
0x00007ffd0679b067	(chrome_child.dll -message_loop.cc:373 )	base::MessageLoop::DoWork()
0x00007ffd0679d7e9	(chrome_child.dll -message_pump_win.cc:478 )	base::MessagePumpForIO::DoRunLoop()
0x00007ffd0679d677	(chrome_child.dll -message_pump_win.cc:56 )	base::MessagePumpWin::Run(base::MessagePump::Delegate *)
0x00007ffd0679abc0	(chrome_child.dll -run_loop.cc:102 )	base::RunLoop::Run()
0x00007ffd0679a9cf	(chrome_child.dll -thread.cc:337 )	base::Thread::ThreadMain()
0x00007ffd07e3c803	(chrome_child.dll -platform_thread_win.cc:91 )	base::`anonymous namespace'::ThreadFunc
0x00007ffd51572783	(KERNEL32.DLL + 0x00012783 )	BaseThreadInitThunk
0x00007ffd53fe0d50	(ntdll.dll + 0x00070d50 )	RtlUserThreadStart