<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 5.13.8

Error message:
Error getting name of current remote directory.

Invalid access to memory.

Stack trace:
(0042F065) Dirview::TDirView::CutToClipBoard
(008BF99A) C5105_3
(008C1A02) ____ExceptionHandler
(008BE7BC) __ExceptionHandler
(00083FFF) ntdll.dll
(00071931) ntdll.dll.KiUserExceptionDispatcher
(007C0142) TTerminal::ReadCurrentDirectory
(007BB8CB) TTerminal::ReactOnCommand
(0067CDA3) TUnixDirView::ChangeDirectory
(0067B156) TUnixDirView::ExecuteFile
(0041E64A) Customdirview::TCustomDirView::DoExecute
(0041F21B) Customdirview::TCustomDirView::WMLButtonDblClk
(0025BD51) Vcl::Controls::TWinControl::WndProc
(0029FC7F) Vcl::Comctrls::TCustomListView::WndProc
(0038109C) System::Classes::_18201
(00045359) USER32.dll
(00036297) USER32.dll
(000357EA) USER32.dll.CallWindowProcW
(0007430F) COMCTL32.DLL
(000743AE) COMCTL32.DLL
(000740AC) COMCTL32.DLL
(00045359) USER32.dll
(00036297) USER32.dll
(000357EA) USER32.dll.CallWindowProcW
(00443FF7) Dragdrop::TDragDrop::WndMethod
(0038109C) System::Classes::_18201
(00045359) USER32.dll
(00036297) USER32.dll
(000353D6) USER32.dll
(000351AB) USER32.dll.DispatchMessageW

(008C0005) C5105_3
(008C15DF) _ReThrowException
(007BD312) TTerminal::DoChangeDirectory
(007C0142) TTerminal::ReadCurrentDirectory
(007BB8CB) TTerminal::ReactOnCommand
(0067CDA3) TUnixDirView::ChangeDirectory
(0067B156) TUnixDirView::ExecuteFile
(0041E64A) Customdirview::TCustomDirView::DoExecute
(0041F21B) Customdirview::TCustomDirView::WMLButtonDblClk
(0025BD51) Vcl::Controls::TWinControl::WndProc
(0029FC7F) Vcl::Comctrls::TCustomListView::WndProc
(0038109C) System::Classes::_18201
(00045359) USER32.dll
(00036297) USER32.dll
(000357EA) USER32.dll.CallWindowProcW
(0007430F) COMCTL32.DLL
(000743AE) COMCTL32.DLL
(000740AC) COMCTL32.DLL
(00045359) USER32.dll
(00036297) USER32.dll
(000357EA) USER32.dll.CallWindowProcW
(00443FF7) Dragdrop::TDragDrop::WndMethod
(0038109C) System::Classes::_18201
(00045359) USER32.dll
(00036297) USER32.dll
(000353D6) USER32.dll
(000351AB) USER32.dll.DispatchMessageW

The problem happens rarely. I cannot reproduce it.