Invalid access to memory

<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 5.7

Error message:
Invalid access to memory.

Stack trace:
[01913ED4]
[77426CC6] ntdll.dll.RtlRaiseStatus
[77426B52] ntdll.dll.KiUserExceptionDispatcher
[017A54FA]
[017A9FB3]
[0138F743]
[014F6AC6]
[01347C11]
[0134C755]
[01390683]
[0134C8BB]
[0134C755]
[0134BD9C]
[01470678]
[75F3C4F4] USER32.dll
[75F3C5F2] USER32.dll
[75F34F16] USER32.dll
[75F34F8A] USER32.dll
[77426B2B] ntdll.dll.KiUserCallbackDispatcher
[75F3558D] USER32.dll.SendMessageW
[732EC06D] COMCTL32.DLL
[732E5EC5] COMCTL32.DLL
[732E8D14] COMCTL32.DLL
[732E8E5B] COMCTL32.DLL
[732E85F1] COMCTL32.DLL
[732E7CA2] COMCTL32.DLL
[732E7C26] COMCTL32.DLL
[732E7B81] COMCTL32.DLL
[732E7CBF] COMCTL32.DLL
[732EFE7B] COMCTL32.DLL
[75F3C4F4] USER32.dll
[75F3C5F2] USER32.dll
[75F31B34] USER32.dll
[75F31B5A] USER32.dll.CallWindowProcW
[0134C866]
[01350BCF]
[01347C11]
[0134C755]
[01390683]
[0134D18F]
[01392499]
[0134C755]
[01390683]
[01470678]
[75F3C4F4] USER32.dll
[75F3C5F2] USER32.dll
[75F31B34] USER32.dll
[75F31B5A] USER32.dll.CallWindowProcW
[0152F24F]
[01470678]
[75F3C4F4] USER32.dll
[75F35FAA] USER32.dll
[75F34F16] USER32.dll
[75F34F8A] USER32.dll
[77426B2B] ntdll.dll.KiUserCallbackDispatcher
[75F3CC83] USER32.dll.DispatchMessageW

Status: symbol_unknown

The problem happens rarely. I cannot reproduce it.