<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)>

WinSCP 5.19

Error message:
Ошибка доступа к памяти.

Трассировка стека:
(0043BAB4) System::UStrAsg
(00FBBC06) C5294_0
(00FBDC6E) ____ExceptionHandler
(00FBAA28) __ExceptionHandler
(000878AF) ntdll.dll
(00073EE1) ntdll.dll.KiUserExceptionDispatcher
(00075BC6) TEditorManager::GetFileTimestamp
(00075CE5) TEditorManager::HasFileChanged
(00074146) TEditorManager::FileClosed
(00E0E016) TEditorForm::FormClose

The problem happens rarely. I cannot reproduce it.