fixes #67041

src/vs/workbench/parts/files/electron-browser/views/openEditorsView.ts

@@ -146,8 +146,11 @@ export class OpenEditorsView extends ViewletPanel {
 						break;
 					}
 					case GroupChangeKind.EDITOR_OPEN: {
-						this.list.splice(index, 0, [new OpenEditor(e.editor, group)]);
-						setTimeout(() => this.updateSize(), this.structuralRefreshDelay);
+						setTimeout(() => {
+							this.list.splice(index, 0, [new OpenEditor(e.editor, group)]);
+							this.updateSize();
+							this.focusActiveEditor();
+						}, this.structuralRefreshDelay);
 						break;
 					}
 					case GroupChangeKind.EDITOR_CLOSE: {
@@ -395,9 +398,11 @@ export class OpenEditorsView extends ViewletPanel {
 	private focusActiveEditor(): void {
 		if (this.list.length && this.editorGroupService.activeGroup) {
 			const index = this.getIndex(this.editorGroupService.activeGroup, this.editorGroupService.activeGroup.activeEditor);
-			this.list.setFocus([index]);
-			this.list.setSelection([index]);
-			this.list.reveal(index);
+			if (index < this.list.length) {
+				this.list.setFocus([index]);
+				this.list.setSelection([index]);
+				this.list.reveal(index);
+			}
 		} else {
 			this.list.setFocus([]);
 			this.list.setSelection([]);