### Godot version

master ([06ccbfe](https://github.com/godotengine/godot/commit/06ccbfe8eec6e840db3df2360dc2804386f940b8))

### System information

PopOS 22.04

### Issue description

Sometimes the doc page is broken when the engine is closed and then restarted.
Closing the doc and opening it again fixes it.

![2023-05-27_22-15](https://github.com/godotengine/godot/assets/3624853/ed202a55-03e8-420a-bc1c-ccfc7f7cd02a)


### Steps to reproduce

- Open a documentation page for any node
- Restart Godot

### Minimal reproduction project

NA

EDIT : Added the commit hash @Calinou 
while (subitems.size()) {
				memdelete(subitems.front()->get());
				subitems.pop_front();
			}
		}
		virtual ~Item() { _clear_children(); }
	};
	struct ItemFrame : public Item {
		bool cell = false;
		LocalVector<Line> lines;
		std::atomic<int> first_invalid_line;
		std::atomic<int> first_invalid_font_line;
		std::atomic<int> first_resized_line;
		ItemFrame *parent_frame = nullptr;
		Color odd_row_bg = Color(0, 0, 0, 0);
		Color even_row_bg = Color(0, 0, 0, 0);
		Color border = Color(0, 0, 0, 0);
		Size2 min_size_over = Size2(-1, -1);
		Size2 max_size_over = Size2(-1, -1);
		Rect2 padding;
		ItemFrame() {