ensure vscode.window.showTextEditor opens a text editor not a custom editor, #96397

src/vs/workbench/api/browser/mainThreadEditors.ts

@@ -124,7 +124,8 @@ export class MainThreadTextEditors implements MainThreadTextEditorsShape {
 			selection: options.selection,
 			// preserve pre 1.38 behaviour to not make group active when preserveFocus: true
 			// but make sure to restore the editor to fix https://github.com/microsoft/vscode/issues/79633
-			activation: options.preserveFocus ? EditorActivation.RESTORE : undefined
+			activation: options.preserveFocus ? EditorActivation.RESTORE : undefined,
+			ignoreOverrides: true
 		};
 
 		const input: IResourceEditorInput = {