This is as designed and documented. Event handlers should never change the state of the editor.
対処法
In the OnStopOperation handler call execute on the save edits command. Dim saveUID As UID = New UIDsaveUID.Value = "esriEditor.SaveEditsCommand"Dim pDoc As IDocument = m_application.DocumentDim pCommandbars As ICommandBars = pDoc.CommandBarsDim pSaveEditC As ICommandItem = pCommandbars.Find(saveUID, True, False)pSaveEditC.Execute()