I have added this issue to the tracker:
Issue 2426 – Checking if edited/opened file was modified externally didn't work for inactive sessions

I'm sending you an email with a development version of WinSCP to the address you have used to register on this forum.

Thanks. I've found the problem. I'll look into it and contact you in few days.

I would like to add that the prompt to save does actually work on the right file under the right host. So, as long as I pay attention to what I'm saving, the end result is correct.
Thank you so much for this great tool.

It was possible, but unlikely.

I captured a new set of logs, with just 3 sessions open. Please see attached.

Sorry, you are indeed right.
Isn't it possible that you has multiple sessions to orbdb-orbdb-rep opened?

Hello,

I believe I have "Append session name to temporary path" set. See attached.

@alexmadd: Ok, will consider that. Though, you know what file you have just saved.

@Bill_Fields: It looks like you are editing the same file on two different servers. And you have enabled option "Keep temporary copies of remote files in deterministic paths", but not "Append session name to temporary path". With that combination, the two files are saved to the same local temporary path, overwriting one another, causing havoc.

Try enabling "Append session name to temporary path", it should resolve your problem. If not, please post new logs (and please try to reproduce the problem with as little opened sessions as possible).

Also suggest to add the filename about what file is asking to overwrite.

Here you go.
Thanks.

Thanks for your report. Though I cannot reproduce the problem.
Please start WinSCP with /applog=C:\some\path\app.log command line parameter, enable also session logging, reproduce the problem, and post both app and session logs.

Using WinSCP 6.5.5 with "Explorer" interface on Windows 11 Enterprise 23H2.

I have two remote sessions open, and I'm using NP++ to edit a text file from HostB. If WinSCP has the tab from HostA selected and I save a change to the file on HostB, I get the following message:

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Confirm
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The remote file has been changed while you were editing it. Do you want to overwrite it anyway?
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OK Cancel Help
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This happens every time. If the tab for HostB is selected, there's no message when I save the file. Not a serious issue that I can see, but it is bothersome.

This is a typical scenario for me (editing a file on one remote host while I'm looking at other remote hosts), so I have to say that it started happening with v6.5.5.

Thanks.