This bug has been added to the tracker:
https://winscp.net/tracker/1629

The problem seems to still exist. I have sent the detailed information to you via email.
By the way, thanks for your great work in WinSCP.

Ok, thanks for your reply.
I'll test with the debug version to see if the problem still exists or not.

Thanks for your report.
I have sent you an email with a debug version of WinSCP to the address you have used to register on this forum.

After connected to a machine with SSH service running through SFTP protocol, if trying to edit an image in the machine with internal editor directly, the program seems to crash and exits immediately.
Then I repeat the steps above with windbg attached to the WinSCP process, it shows the stack overflow (code 0xc00000fd) exception(not stack buffer overflow exception).
Related information are as follows:

WinSCP version: 5.13.1(latest version available from the website) (both installed version and portable version have been tested)
Version of Microsoft Windows: both win10 education version and winxp sp3 have been tested
Transfer protocol: both SFTP and SCP have beed tested
User interface: Commander