put command in script ignores -preservetime

I wrote a small script which uploads files to a server. It use my existing sesion which preserves time stamps.

This command is like this:


and it works fine. However, if I change it to


it DOESN'T preserve time stamps, instead of that it writes present time!
The same behavior is with -nopreservetime (which is expected).

I made Windows shortcut with target line:
"C:\.....\WinSCP\winscp416.exe" /console /script=winscp_upload_script XXX@YYY.ZZZ

Winscp version: 4.16

What protocol are you using? Note that with FTP, preserving timestamp of uploaded files does not work.