Invalid access to memory - TTerminalManager::FreeTerminal

Just resumed Win from sleep with WinSCP left open.

WinSCP 5.15.4

Error message:
Invalid access to memory.

Stack trace:
(000AB90E) TTerminalManager::FreeTerminal
(0008402F) ntdll.dll
(00071931) ntdll.dll.KiUserExceptionDispatcher
(000AAF3F) TTerminalManager::FreeActiveTerminal
(000BC93D) ShowExtendedExceptionEx
(00021044) TCustomScpExplorerForm::ShowExtendedException
(000ACD39) TTerminalManager::TerminalShowExtendedException
(00817834) TTerminal::ShowExtendedException
(0023D10E) Vcl::Forms::TApplication::HandleException
(003A3E28) System::Classes::_18201
(00045359) USER32.dll
(00036297) USER32.dll
(000353D6) USER32.dll
(000351AB) USER32.dll.DispatchMessageW

(00386CED) System::Classes::TList::Get
(00386CED) System::Classes::TList::Get
(000AAF3F) TTerminalManager::FreeActiveTerminal
(000BC93D) ShowExtendedExceptionEx
(00021044) TCustomScpExplorerForm::ShowExtendedException
(000ACD39) TTerminalManager::TerminalShowExtendedException
(00817834) TTerminal::ShowExtendedException
(0023D10E) Vcl::Forms::TApplication::HandleException
(003A3E28) System::Classes::_18201
(00045359) USER32.dll
(00036297) USER32.dll
(000353D6) USER32.dll
(000351AB) USER32.dll.DispatchMessageW

(00417540) System::HandleAnyException
(0008402F) ntdll.dll
(00071931) ntdll.dll.KiUserExceptionDispatcher
(003A3E28) System::Classes::_18201
(00045359) USER32.dll
(00036297) USER32.dll
(000353D6) USER32.dll
(000351AB) USER32.dll.DispatchMessageW

The problem happens rarely. I cannot reproduce it.