<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 5.17.9

Error message:
(000EF802)
(00F89F32)
(00F8BF9A)
(00F88D54)
(00088F2F) ntdll.dll
(000743C1) ntdll.dll.KiUserExceptionDispatcher
(000F0040)
(000F01BA)
(000F02D0)
(00019E1D)
(0023958D)
(0027ACF1)
(002351B8)

(00F8A59D)
(00F8BB77)
(000EF89A)
(000F0040)
(000F01BA)
(000F02D0)
(00019E1D)
(0023958D)
(0027ACF1)
(002351B8)

Status: unknown_rel_addr

The problem happens rarely. I cannot reproduce it.