Invalid access to memory - _random_ref

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WinSCP 5.7.3

Error message:
Invalid access to memory.

Stack trace:
(00038E33) ntdll.dll
(007E1CA2) C4799_3
(007E3D0A) ____ExceptionHandler
(007E0C84) __ExceptionHandler
(0005A67A) ntdll.dll
(0000F15E) ntdll.dll.KiUserExceptionDispatcher
(00038D3D) ntdll.dll.RtlEncodePointer
(006014ED) _random_ref
(00638D64) CoreInitialize
(007DFDF9) C4667_0
(000382E0) ntdll.dll
(000382B0) ntdll.dll

The problem happens rarely. I cannot reproduce it.