### 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 
for (int i = 0; i < subtag.size(); i++) {
				Vector<String> subtag_a = subtag[i].split("=");
				_normalize_subtags(subtag_a);
				if (subtag_a.size() == 2) {
					if (subtag_a[0] == "justification_flags" || subtag_a[0] == "jst") {
						Vector<String> subtag_b = subtag_a[1].split(",");
						for (const String &E : subtag_b) {
							if (E == "kashida" || E == "k") {
								jst_flags.set_flag(TextServer::JUSTIFICATION_KASHIDA);
							} else if (E == "word" || E == "w") {
								jst_flags.set_flag(TextServer::JUSTIFICATION_WORD_BOUND);
							} else if (E == "trim" || E == "tr") {
								jst_flags.set_flag(TextServer::JUSTIFICATION_TRIM_EDGE_SPACES);
							} else if (E == "after_last_tab" || E == "lt") {
								jst_flags.set_flag(TextServer::JUSTIFICATION_AFTER_LAST_TAB);
							} else if (E == "skip_last" || E == "sl") {
								jst_flags.set_flag(TextServer::JUSTIFICATION_SKIP_LAST_LINE);
							} else if (E == "skip_last_with_chars" || E == "sv") {
								jst_flags.set_flag(TextServer::JUSTIFICATION_SKIP_LAST_LINE_WITH_VISIBLE_CHARS);
							} else if (E == "do_not_skip_singe" || E == "ns") {
								jst_flags.set_flag(TextServer::JUSTIFICATION_DO_NOT_SKIP_SINGLE_LINE);
							}
						}
					} else if (subtag_a[0] == "tab_stops") {
						Vector<String> splitters;
						splitters.push_back(",");
						splitters.push_back(";");
						tab_stops = subtag_a[1].split_floats_mk(splitters);
					} else if (subtag_a[0] == "align") {
						if (subtag_a[1] == "l" || subtag_a[1] == "left") {