Licensee reported getting this error on PS4 after losing internet connection or putting the console into rest mode. See linked UDN for callstack.
The NetConnection calls Close during its Tick, due to the connection timing out. Then from there, the NetConnection calls FlushNet, which triggers another error within HandleSocketSendResult, this time causing GEngine->BroadcastNetworkFailure to be called.

Steps to Reproduce

See comment with CL to reproduce the issue. 

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ComponentUE - Networking
Affects Versions4.26
Target Fix4.27
Fix Commit16623674
Main Commit16633236
Release Commit16623674
CreatedMay 12, 2021
ResolvedJun 10, 2021
UpdatedDec 1, 2022