### Godot version

4.2.dev1

### System information

Manjaro Linux (DE: Cinnamon v5.8.4) 64 bits

### Issue description

The title already explains it. Take a look at the steps to reproduce below.

### Steps to reproduce

In a GDScript `_ready()` function write this:
```print_rich("[color=red]Red line\n2nd red line[/color]")```

the second line is not red and the output is as follow:
![Capture d’écran du 2023-07-29 05-50-16](https://github.com/godotengine/godot/assets/102065761/554038c6-d128-40c9-8c88-237b44b35b12)

I tested all the the possible BBCodes for the print_rich() method (as stated in the documentation), and of course they all failed.

The RichTextLabel in my projects works as expected.

### Minimal reproduction project

N/A
switch (p_what) {
		case NOTIFICATION_ENTER_TREE: {
			_update_theme();
			_load_state();
		} break;
		case NOTIFICATION_THEME_CHANGED: {
			_update_theme();
			_rebuild_log();
		} break;
	}
}
void EditorLog::_set_collapse(bool p_collapse) {
	collapse = p_collapse;
	_start_state_save_timer();
	_rebuild_log();
}
void EditorLog::_start_state_save_timer() {
	if (!is_loading_state) {
		save_state_timer->start();
	}
}
void EditorLog::_save_state() {