Invalid access to memory

I turned the computer to sleep mode.

WinSCP 5.15.4

Error message:
Invalid access to memory.

Stack trace:
(0041641C)
(00928272)
(0092A2DA)
(00927094)
(0007E19F) ntdll.dll
(0006BD81) ntdll.dll.KiUserExceptionDispatcher
(00101B77)
(00002664)
(009262A9)
(000631C6) ntdll.dll.RtlAreBitsSet
(00063193) ntdll.dll.RtlAreBitsSet

Status: unknown_rel_addr

The problem happens rarely. I cannot reproduce it.