<Try to describe precise steps that lead to the problem (where do you click, what keys do you press, what do you see, etc.)>

Copying website folders from remote linux client to local folder

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

WinSCP 5.9.1

Error message:
Error occurred during logging. It's been turned off.

Out of memory

Stack trace:
(003E4B52)
(003E4B52)
(0065FC28)
(007285E2)
(00728750)
(007386D0)
(007392E0)
(00766C9F)
(0074F8D8)
(00763B8A)
(0075FC1A)
(007656F1)
(00775235)
(007607DB)
(0075FC1A)
(007656F1)
(00775235)
(007607DB)
(0075FC1A)
(007656F1)
(00775235)
(007607DB)
(0075FC1A)
(007656F1)
(00775235)
(007607DB)
(0075FC1A)
(007656F1)
(00775235)
(007607DB)
(0075FC1A)
(007656F1)
(00775235)
(007607DB)
(0075FC1A)
(007656F1)
(00775235)
(007607DB)
(0075FC1A)
(007656F1)
(00775235)
(007607DB)
(0075FC1A)
(007656F1)
(00775235)
(007607DB)
(0075FC1A)
(007656F1)
(00775235)
(007607DB)
(0075FC1A)
(007656F1)
(00775235)
(007607DB)
(0075FC1A)
(007656F1)
(00775235)
(007607DB)
(0075FC1A)
(007656F1)
(00775235)
(007607DB)
(0075FC1A)
(007656F1)
(00775235)
(007607DB)
(0075FC1A)
(007656F1)
(00775235)
(007607DB)
(0075FC1A)
(007656F1)
(00775235)
(007607DB)
(0075FC1A)
(007656F1)
(00775235)
(007607DB)
(0075FC1A)
(0075FA0E)
(007846E1)
(0000DE8A)
(0000EAE4)
(0001D803)
(0001DB60)
(004088A2)
(00654862)
(00404D04)
(00249F15)
(0024EA59)
(00292987)
(0024EBBF)
(0024EA59)
(0024E0A0)

Status: unknown_rel_addr

The problem happens rarely. I cannot reproduce it.