### 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 
};
	struct ItemFont : public Item {
		DefaultFont def_font = CUSTOM_FONT;
		Ref<Font> font;
		bool variation = false;
		bool def_size = false;
		int font_size = 0;
		ItemFont() { type = ITEM_FONT; }
	};
	struct ItemFontSize : public Item {
		int font_size = 16;
		ItemFontSize() { type = ITEM_FONT_SIZE; }
	};
	struct ItemColor : public Item {
		Color color;
		ItemColor() { type = ITEM_COLOR; }
	};
	struct ItemOutlineSize : public Item {
		int outline_size = 0;
		ItemOutlineSize() { type = ITEM_OUTLINE_SIZE; }
	};
	struct ItemOutlineColor : public Item {
		Color color;
		ItemOutlineColor() { type = ITEM_OUTLINE_COLOR; }