Running WinSCP under Wine-5.22 on Arch linux kernel 5.8.14-zen1-1-zen
Editing a text config file on a remote machine in the LAN, did not even press Ctrl S or anything
WinSCP 5.17.9

Error message:
Range check error

Stack trace:
(00F8A59D)
(00F8BAD0)
(00DDA9FC)
(00DDAF88)
(0027ACF1)
(00275DE8)
(0027AE57)
(0027ACF1)
(002351B8)

Status: unknown_rel_addr

The problem happens rarely. I cannot reproduce it.