Invalid access to memory

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<If relevant, consider attaching a session log file or a screenshot)>

WinSCP 5.13.1

Error message:
Invalid access to memory.

Stack trace:
(003EF348)
(008BA3F6)
(008BC45E)
(008B9218)
(0007DABF) ntdll.dll
(0006B6E1) ntdll.dll.KiUserExceptionDispatcher
(000E244E)
(000024A8)
(008B842D)
(0006202A) ntdll.dll.RtlValidSecurityDescriptor
(00061FF5) ntdll.dll.RtlValidSecurityDescriptor

Status: unknown_rel_addr

The problem happens rarely. I cannot reproduce it.