This doesn't happen always, and I can't quite figure out what causes it -- hopefully you can.
I start gzipping a large file 200GB on the remote Linux box, which takes multiple hours to gzip down to 80-100GB
While it's zipping, I start downloading it -- and on most days, it's completed before my 09:30AM cutoff time (before I have to pause it) -- slow VPN
But on days like today, I kicked the download off a bit late the evening before, so I had to pause it at 09:25 by hitting the || pause button
The filepart file was 53GB and sat around all day being that size.
At 16:30, I went to resume the download -- but when I did, the filepart file was reset back to 0 byte and it started re-downloading the entire 100GB file again.
This happens quite often, but not always -- I've had days when resuming it would continue where it left off.
Funny enough if I pause it and then kill WinSCP, and bring it up later -- it almost always picks up the filepart and continues -- it's primarily when I pause/unpause it without killing.
I thought that maybe my VPN disconnects and reconnects midday, or the pausing causes something to be lost or a checksum to be failed, or some other issue