<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 5.15.2

Error message:
Трассировка стека:
(00392A69) System::Classes::_17617
(0038F1B2) System::Classes::TStream::ReadComponent
(00384BF7) System::Classes::_17089
(0038654B) System::Classes::_17116
(003865D9) System::Classes::InitInheritedComponent
(00231BE2) Vcl::Forms::TCustomForm::TCustomForm
(00004486) Vcl::Forms::TForm::TForm
(008AAF29) TPropertiesDialog::TPropertiesDialog
(008AAE0F) DoPropertiesDialog
(00017289) TCustomScpExplorerForm::SetProperties
(000105D0) TCustomScpExplorerForm::ExecuteFileOperation
(0001073C) TCustomScpExplorerForm::ExecuteFileOperation
(000107C3) TCustomScpExplorerForm::ExecuteFileOperationCommand
(0004207A) TNonVisualDataModule::ExplorerActionsExecute
(003E75CC) System::Actions::TContainedActionList::ExecuteAction
(001C61B5) Vcl::Actnlist::TCustomAction::Execute
(003A3BA8) System::Classes::_18201
(0001B4B4) USER32.dll
(0001B5B2) USER32.dll
(0001BBE4) USER32.dll
(0001BC3B) USER32.dll.DispatchMessageW

The problem happens rarely. I cannot reproduce it.