### 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 
st_parser_type = TextServer::STRUCTURED_TEXT_GDSCRIPT;
						} else if (subtag_a[1] == "c" || subtag_a[1] == "custom") {
							st_parser_type = TextServer::STRUCTURED_TEXT_CUSTOM;
						}
					}
				}
			}
			push_paragraph(alignment, dir, lang, st_parser_type, jst_flags, tab_stops);
			pos = brk_end + 1;
			tag_stack.push_front("p");
		} else if (tag == "url") {
			int end = p_bbcode.find("[", brk_end);
			if (end == -1) {
				end = p_bbcode.length();
			}
			String url = p_bbcode.substr(brk_end + 1, end - brk_end - 1).unquote();
			push_meta(url);
			pos = brk_end + 1;
			tag_stack.push_front(tag);
		} else if (tag.begins_with("url=")) {
			String url = tag.substr(4, tag.length()).unquote();
			push_meta(url);
			pos = brk_end + 1;
			tag_stack.push_front("url");
		} else if (tag.begins_with("hint=")) {
			String description = tag.substr(5, tag.length()).unquote();
			push_hint(description);
			pos = brk_end + 1;
			tag_stack.push_front("hint");
		} else if (tag.begins_with("dropcap")) {