The other logfile logg2.log after line:
„2019-01-11 13:54:44.189 Startup conversation with host finished.“
All the cmds like „cd / or help or other“ will not receive :-/
Do you mean that you send some commands to WinSCP using the "pipe"; and they are not received by WinSCP?
We cannot help you with that, as you didn't show us any code.