<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 5.13.7

Error message:
メモリのアクセス違反

スタック トレース:
(001FD694) Vcl::Graphics::TBrush::SetColor
(00089BEF) ntdll.dll
(00070AB1) ntdll.dll.KiUserExceptionDispatcher
(0025720D) Vcl::Controls::TControl::WndProc
(00256E48) Vcl::Controls::TControl::Perform
(0025C1FA) Vcl::Controls::TWinControl::PaintControls
(00256015) Vcl::Controls::TControl::Repaint
(00077C3C) TFrameAnimation::Repaint
(0038109C) System::Classes::_18201
(0001D0B9) USER32.dll
(00027844) USER32.dll
(0002A140) USER32.dll
(000180D7) USER32.dll
(00017C1B) USER32.dll.DispatchMessageW

The problem happens rarely. I cannot reproduce it.