tree: clear auto expand disposable on drop

src/vs/base/browser/ui/tree/abstractTree.ts

@@ -104,6 +104,9 @@ class TreeNodeListDragAndDrop<T, TFilterData, TRef> implements IListDragAndDrop<
 	}
 
 	drop(data: IDragAndDropData, targetNode: ITreeNode<T, TFilterData> | undefined, targetIndex: number | undefined, originalEvent: DragEvent): void {
+		this.autoExpandDisposable.dispose();
+		this.autoExpandNode = undefined;
+
 		this.dnd.drop(asTreeDragAndDropData(data), targetNode && targetNode.element, targetIndex, originalEvent);
 	}
 }