### 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 
} else {
			after_list_open_tag = false;
		}
		if (!txt.is_empty()) {
			add_text(txt);
		}
		after_list_close_tag = false;
		if (tag == "b") {
			
			in_bold = true;
			if (in_italics) {
				_push_def_font(BOLD_ITALICS_FONT);
			} else {
				_push_def_font(BOLD_FONT);
			}
			pos = brk_end + 1;
			tag_stack.push_front(tag);
		} else if (tag == "i") {
			
			in_italics = true;
			if (in_bold) {
				_push_def_font(BOLD_ITALICS_FONT);
			} else {
				_push_def_font(ITALICS_FONT);
			}
			pos = brk_end + 1;
			tag_stack.push_front(tag);
		} else if (tag == "code") {
			
			_push_def_font(MONO_FONT);