<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 5.13.3

Error message:
Копирование файлов с сервера не удалось.

Ошибка доступа к памяти.

Трассировка стека:
(0025DE58) Vcl::Controls::TWinControl::HandleNeeded
(008BCA5A) C5104_0
(008BEAC2) ____ExceptionHandler
(008BB87C) __ExceptionHandler
(00081D3F) ntdll.dll
(0006F8EA) ntdll.dll.KiUserExceptionDispatcher

(008BD0C5) C5104_0
(008BE69F) _ReThrowException
(007B8AF3) TTerminal::DoFinished
(006BC649) TFileOperationProgressType::Finish
(007D1550) TTerminal::DoCopyToLocal
(007A6E26) TSFTPFileSystem::CopyToLocal
(007D0FDE) TTerminal::CopyToLocal
(0000E861) TCustomScpExplorerForm::ExecuteFileOperation
(00025AE6) TCustomScpExplorerForm::DoOperationOnFoundFiles
(00025B5E) TCustomScpExplorerForm::DoDownloadFoundFiles
(00804C5A) TFileFindDialog::FileListOperation
(008050E0) TFileFindDialog::DownloadActionExecute
(00380370) System::Classes::_18201
(0002C2B1) USER32.dll
(0000D885) USER32.dll
(0000D1DF) USER32.dll
(0000CF9B) USER32.dll.DispatchMessageW

The problem happens rarely. I cannot reproduce it.