Zugriffsverletzung - ungültiger Zugriff auf den Speicher

Initial file download trough SSH tunnel failed.
Retry with key-agent active and delivering (maybe wrong) key caused the error


WinSCP 5.9.4

Error message:
Zugriffsverletzung - ungültiger Zugriff auf den Speicher.

Stack trace:
(008556DC) C3427_0
(00866B5E) C5073_0
(00868BC6) ____ExceptionHandler
(00865980) __ExceptionHandler
(000624F6) [77ED34

Status: all_insignificant

The problem happens rarely. I cannot reproduce it.