Error: Timeout waiting for WinSCP to respond - WinSCP has not responded in time - 5.7.5
Daily scheduled task running PowerShell script to perform SFTP upload. Frequently (but not always) errors out with "Timeout waiting for WinSCP to respond - WinSCP has not responded in time (response log file blabla.tmp was not created)". We know it's not permission issues since it does run successfully more than half of the time.
Server is 2008 R2
WinSCP version 5.7.5 with .NET library file 18.104.22.16865 (part of version 5.7.5).
Recently upgraded from 5.5.6 (and rebooted) but it hasn't made a difference.