External exception C000001D - System::CallDynaInst

<Try to describe precise steps that lead to the problem (where do you click, what keys do you press, what do you see, etc.)>
<If relevant, consider attaching a session log file or a screenshot)>
In the middle of an download of a large virtual Disk File...


WinSCP 5.7.6

Error message:
External exception C000001D

Stack trace:
(003B08B7) System::CallDynaInst
(00046286) ntdll.dll.RtlRaiseStatus

The problem happens rarely. I cannot reproduce it.