<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 5.17.5

Error message:
Invalid access to memory.

Stack trace:
(00000603) DWMAPI.DLL.DwmIsCompositionEnabled
(000624EE) ntdll.dll
(0000F15E) ntdll.dll.KiUserExceptionDispatcher
(002BEF35) Vcl::Comctrls::TCustomListView::WMPaint
(00279E45) Vcl::Controls::TWinControl::WndProc
(002BD11F) Vcl::Comctrls::TCustomListView::WndProc
(003A4AA8) System::Classes::_18201
(00015307) USER32.dll
(00015D45) USER32.dll
(0001FD5A) USER32.dll
(0001FD80) USER32.dll.CallWindowProcW
(0047BD83) Dragdrop::TDragDrop::WndMethod
(003A4AA8) System::Classes::_18201
(00015307) USER32.dll
(00015D45) USER32.dll
(00015DF3) USER32.dll
(00015E51) USER32.dll
(0000F137) ntdll.dll.KiUserCallbackDispatcher
(00016895) USER32.dll.DispatchMessageW

The problem happens rarely. I cannot reproduce it.

<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 5.15.2

Error message:
Invalid access to memory.

Stack trace:
(00000603) DWMAPI.DLL.DwmIsCompositionEnabled
(0006248E) ntdll.dll
(0000F15E) ntdll.dll.KiUserExceptionDispatcher
(002BE035) Vcl::Comctrls::TCustomListView::WMPaint
(00278F45) Vcl::Controls::TWinControl::WndProc
(002BC21F) Vcl::Comctrls::TCustomListView::WndProc
(003A3BA8) System::Classes::_18201
(000152F7) USER32.dll
(00015D35) USER32.dll
(0001FD3A) USER32.dll
(0001FD60) USER32.dll.CallWindowProcW
(0047A973) Dragdrop::TDragDrop::WndMethod
(003A3BA8) System::Classes::_18201
(000152F7) USER32.dll
(00015D35) USER32.dll
(00015DE3) USER32.dll
(00015E41) USER32.dll
(0000F137) ntdll.dll.KiUserCallbackDispatcher
(00016885) USER32.dll.DispatchMessageW

The problem happens rarely. I cannot reproduce it.