### 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 
prefix = "." + prefix;
		}
		String segment;
		if (list_items[i]->list_type == LIST_DOTS) {
			prefix = list_items[i]->bullet;
			break;
		} else if (list_items[i]->list_type == LIST_NUMBERS) {
			segment = itos(list_index[i]);
			if (is_localizing_numeral_system()) {
				segment = TS->format_number(segment, _find_language(l.from));
			}
		} else if (list_items[i]->list_type == LIST_LETTERS) {
			segment = _letters(list_index[i], list_items[i]->capitalize);
		} else if (list_items[i]->list_type == LIST_ROMAN) {
			segment = _roman(list_index[i], list_items[i]->capitalize);
		}
		if (rtl) {
			prefix = prefix + segment;
		} else {
			prefix = segment + prefix;
		}
	}
	if (!prefix.is_empty()) {
		Ref<Font> font = theme_cache.normal_font;
		int font_size = theme_cache.normal_font_size;
		ItemFont *font_it = _find_font(l.from);
		if (font_it) {
			if (font_it->font.is_valid()) {
				font = font_it->font;
			}