List index out of bounds (-1) - System::Classes::TStringList::Delete

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WinSCP 5.7.7

Error message:
List index out of bounds (-1)

Stack trace:
(0032772A) System::Classes::TStringList::Delete
(0032772A) System::Classes::TStringList::Delete
(00007C63) TCustomScpExplorerForm::HistoryGo
(0003291D) TNonVisualDataModule::ExplorerActionsExecute
(00382614) System::Actions::TContainedActionList::ExecuteAction
(0016A155) Vcl::Actnlist::TCustomAction::Execute
(0034059C) System::Classes::_18201
(00007731) USER32.dll
(00007811) USER32.dll
(000079C8) USER32.dll
(00007A0B) USER32.dll.DispatchMessageW

The problem happens rarely. I cannot reproduce it.

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WinSCP 5.21.1

Error message:
List index out of bounds (-1)

Stack trace:
(003AF676) System::Classes::TStringList::Delete
(003AF676) System::Classes::TStringList::Delete
(0000A70B) TCustomScpExplorerForm::HistoryGo
(0000A738) TCustomScpExplorerForm::HistoryItemClick
(003C85A0) System::Classes::_18201
(000152F7) USER32.dll
(00015D35) USER32.dll
(000167BF) USER32.dll
(00016885) USER32.dll.DispatchMessageW

The problem happens rarely. I cannot reproduce it.