<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 5.13.6

Error message:
メモリのアクセス違反

スタック トレース:
(0021AEDA) Vcl::Forms::_16777
(0007E16F) ntdll.dll
(0006BD81) ntdll.dll.KiUserExceptionDispatcher
(0021AF12) Vcl::Forms::_16777
(0021AF90) Vcl::Forms::TCustomForm::UpdateActions

The problem happens rarely. I cannot reproduce it.