Ongeldige toegang tot geheugen - TSessionData::CopyDirectoriesStateData

It's happens when I close a sessions, not everytime but it happens a couple of times in a week.

WinSCP 5.17.9

Error message:
Ongeldige toegang tot geheugen.

Stack trace:
(0041A004) System::UStrAsg
(000861AF) ntdll.dll
(00072B31) ntdll.dll.KiUserExceptionDispatcher
(00D1354B) TSessionData::CopyDirectoriesStateData
(000ACE70) TTerminalManager::SaveTerminal
(000AC5FE) TTerminalManager::SetActiveTerminal
(00020F8C) TCustomScpExplorerForm::SessionsPageControlChange
(0027ACF1) Vcl::Controls::TWinControl::WndProc
(00275DE8) Vcl::Controls::TControl::Perform
(0027AE57) Vcl::Controls::_17076
(0027ACF1) Vcl::Controls::TWinControl::WndProc
(002351B8) Vcl::Forms::TCustomForm::WndProc

The problem happens rarely. I cannot reproduce it.