Out of 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 5.19.6

Error message:
Out of memory

Трассировка стека:
(0043B95E)
(0043B95E)
(003C6993)
(0023F828)
(00E16FE0)
(002803E1)
(0023A8A8)

Status: unknown_rel_addr

The problem happens rarely. I cannot reproduce it.