External exception EEFFACE

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

WinSCP 5.8.1

Error message:
External exception EEFFACE

Stack trace:
(00014B68) KERNELBASE.dll.RaiseException
(0003EE3E) ntdll.dll.ZwWow64CallFunction64
(0003F5BA) ntdll.dll.KiUserExceptionDispatcher
(00498258)
(008308F6)
(00831C40)
(00815CB4)
(0070F053)
(00710444)
(00723205)
(0071EBFD)
(0071F635)
(007513CE)
(00636BB2)
(002652EA)
(003EBE45)
(0022E601)
(002655A6)
(0022E767)
(0022E601)
(0022DC48)
(0035257C)
(00007E6F) USER32.DLL.CallNextHookEx
(000080CC) USER32.DLL
(0000832E) USER32.DLL
(00008527) USER32.DLL
(0003F594) ntdll.dll.KiUserCallbackDispatcher
(00011B34) USER32.DLL.SendMessageW
(0002CBDB) COMCTL32.DLL
(00073A51) COMCTL32.DLL
(00073770) COMCTL32.DLL
(000DF848) COMCTL32.DLL
(000B3602) COMCTL32.DLL
(00007E6F) USER32.DLL.CallNextHookEx
(000080CC) USER32.DLL
(0000C6C0) USER32.DLL.CallWindowProcW
(0022E712)
(0022E601)
(002655A6)
(0035257C)
(00007E6F) USER32.DLL.CallNextHookEx
(000080CC) USER32.DLL
(0000C6C0) USER32.DLL.CallWindowProcW
(0040BC8B)
(0035257C)
(00007E6F) USER32.DLL.CallNextHookEx
(000080CC) USER32.DLL
(00009625) USER32.DLL
(0000967B) USER32.DLL.DispatchMessageW

Status: unknown_rel_addr

The problem happens rarely. I cannot reproduce it.