<Try to describe precise steps that lead to the problem (where do you click, what keys do you press, what do you see, etc.)>
I am using WinSCP now for years, and this is an first time, but I tried twice and it 'bommed' twice at a similar point. I was busy to 'sync' between a Linux Ubuntu over a local ethernet . Window 10 Prof running on AMD Thread Ripper, SDD. Because it is between two machines it is difficult to send files and create a similar setup.
<If relevant, consider attaching a session log file or a screenshot)>
Invalid access to memory.
The problem happens rarely. I cannot reproduce it.