Ошибка доступа к памяти

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WinSCP 5.13.5

Error message:
Ошибка доступа к памяти.

Трассировка стека:
(007BACCA)
(00083FFF) ntdll.dll
(00071931) ntdll.dll.KiUserExceptionDispatcher
(003C30DC)
(001A8E72)
(0021ACDA)
(0021AD58)

Status: unknown_rel_addr

The problem happens rarely. I cannot reproduce it.