Changed files (sometimes) aren't uploaded

When I save a file, sometimes the change isn't sensed by WinSCP and the file isn't uploaded. I'd guess this happens every 10 times, but it is very random.

I am using the latest Visual Studio as my editor. When WinSCP doesn't sense the change, I can usually wait a minute, resave the file, and it will get uploaded. Oftentimes I get frustrated and choose Stop, Start, and Yes in the "Keep remote directory up to date" dialog, and the file gets updated.

I see other posts about this, where you send a debug build, but I haven't seen a solution.

FWIW, it seems like this problem began about a month (or two) ago.

Thanks!

What version of WinSCP? What protocol are you using? Isn't it SCP (or maybe FTP)?
See https://winscp.net/eng/docs/timestamp#precision

Please attach a full session log file showing the problem (using the latest version of WinSCP).

I'm using 5.17.10. FTP protocol.

I have session logging enabled, Normal level, going to %TEMP%\!S.log. However, it just happened and when I look in %TEMP% (yes, I know what that means), there isn't a file named !S.log.

Are you aware that !S expands to the session name?
https://winscp.net/eng/docs/ui_pref_logging#session_log

I was not aware of that, although I looked at the time stamps of all *.log files in %TEMP% and there weren't any recent log files. I'll increase to Debug 2 and wait for the problem to reappear.

Before waiting for the problem to appear, make sure that the log files are really being written. No need for Debug 2 logs at this stage.

Logs are being written. Changed to Normal. Thanks.