<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 5.9.2

Error message:
Error reading RemoteDriveView.Indent: Access violation at address 00F08EE3 in module 'WinSCP.exe'. Read of address 00000010

Stack trace:
#001F7EE3# Vcl::Graphics::TBitmap::ReadDIB
#0008148F# ntdll.dll
#0006F02A# ntdll.dll.KiUserExceptionDispatcher
#001F7C12# Vcl::Graphics::TBitmap::LoadFromResourceName
#00404688# Customdirview::_16488
#004047D8# Customdirview::OverlayImageList
#0040B395# Customdriveview::TCustomDriveView::CreateWnd
#00363C02# System::Classes::TReader::ReadProperty
#00363455# System::Classes::TReader::ReadDataInner
#00363437# System::Classes::TReader::ReadData
#00370FF9# System::Classes::TComponent::ReadState
#003632AF# System::Classes::TReader::ReadComponent
#003634C9# System::Classes::TReader::ReadDataInner
#00363437# System::Classes::TReader::ReadData
#00370FF9# System::Classes::TComponent::ReadState
#003632AF# System::Classes::TReader::ReadComponent
#003634C9# System::Classes::TReader::ReadDataInner
#00363408# System::Classes::TReader::ReadData
#00370FF9# System::Classes::TComponent::ReadState
#002080B5# Vcl::Forms::TCustomForm::ReadState
#003643E3# System::Classes::TReader::ReadRootComponent
#0035E2AE# System::Classes::TStream::ReadComponent
#00353CF3# System::Classes::_17089
#00355647# System::Classes::_17116
#0035561C# System::Classes::_17116
#003556D5# System::Classes::InitInheritedComponent
#002078AE# Vcl::Forms::TCustomForm::TCustomForm
(00

The problem happens rarely. I cannot reproduce it.