### 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 
set_text(text);
			}
			main->first_invalid_line.store(0); 
			queue_redraw();
		} break;
		case NOTIFICATION_PREDELETE:
		case NOTIFICATION_EXIT_TREE: {
			_stop_thread();
		} break;
		case NOTIFICATION_LAYOUT_DIRECTION_CHANGED:
		case NOTIFICATION_TRANSLATION_CHANGED: {
			_apply_translation();
			queue_redraw();
		} break;
		case NOTIFICATION_INTERNAL_PHYSICS_PROCESS: {
			if (is_visible_in_tree()) {
				queue_redraw();
			}
		} break;
		case NOTIFICATION_DRAW: {
			RID ci = get_canvas_item();
			Size2 size = get_size();
			draw_style_box(theme_cache.normal_style, Rect2(Point2(), size));
			if (has_focus()) {
				RenderingServer::get_singleton()->canvas_item_add_clip_ignore(ci, true);
				draw_style_box(theme_cache.focus_style, Rect2(Point2(), size));
				RenderingServer::get_singleton()->canvas_item_add_clip_ignore(ci, false);
			}
			
			if (_validate_line_caches()) {