I am using WinSCP for a long time. However, with new version I noticed a weird bug.
After completing the transfer, files are missing (they never transfered, only maybe in /tmp folder or something).
This is tested more than once. Than I tried to transfer folder by folder manually. It works, but some folder again did not transfer (even I can see copy progress bar).
Also, this is tested on more computers (home, laptop, my work computer).
This is definitely WinSCP bug.
However, this did not happen in previous versions.