<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 5.7.6

Error message:
Error getting name of current remote directory.

Invalid access to memory.

Stack trace:
(000EEB59) System::Generics::Collections::TDictionary__2<System::TMetaClass *, System::Generics::Collections::TList__1<System::TMetaClass *> *>::Hash
(007E46BA) C4799_3
(007E6722) ____ExceptionHandler
(007E369C) __ExceptionHandler
(0005A5DA) ntdll.dll
(0000F12E) ntdll.dll.KiUserExceptionDispatcher[color=white][/color]

The problem happens rarely. I cannot reproduce it.