Accès mémoire invalide

<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 5.19.2

Error message:
Accès mémoire invalide.

Trace de la pile :
(0043BC54)
(00088F9F) ntdll.dll
(000741F1) ntdll.dll.KiUserExceptionDispatcher
(00480FB1)
(0046E7B5)
(00256CDF)
(003C79D8)
(00043719) USER32.dll
(00024257) USER32.dll
(000233A9) USER32.dll
(0002318B) USER32.dll.DispatchMessageW

Status: unknown_rel_addr

The problem happens rarely. I cannot reproduce it.