### Godot version

2992ffd25523cb8b3e0ef1b873c40115b8940178

### System information

Windows 10

### Issue description

Godot crashes randomly within a few seconds after project start when moving with the mouse.

![win_err](https://github.com/godotengine/godot/assets/52464204/1da28596-d95b-40f3-b32f-12219ec02c5d)

Started after recent merge of https://github.com/godotengine/godot/pull/67791.
I can confirm that reverting the pr fixes the crashes.

### Steps to reproduce

see desc

### Minimal reproduction project

N/A
_notify_theme_override_changed();
		} else {
			return false;
		}
	} else {
		if (name.begins_with("theme_override_icons/")) {
			String dname = name.get_slicec('/', 1);
			add_theme_icon_override(dname, p_value);
		} else if (name.begins_with("theme_override_styles/")) {
			String dname = name.get_slicec('/', 1);
			add_theme_style_override(dname, p_value);
		} else if (name.begins_with("theme_override_fonts/")) {
			String dname = name.get_slicec('/', 1);
			add_theme_font_override(dname, p_value);
		} else if (name.begins_with("theme_override_font_sizes/")) {
			String dname = name.get_slicec('/', 1);
			add_theme_font_size_override(dname, p_value);
		} else if (name.begins_with("theme_override_colors/")) {
			String dname = name.get_slicec('/', 1);
			add_theme_color_override(dname, p_value);
		} else if (name.begins_with("theme_override_constants/")) {
			String dname = name.get_slicec('/', 1);
			add_theme_constant_override(dname, p_value);
		} else {
			return false;
		}
	}
	return true;
}
bool Window::_get(const StringName &p_name, Variant &r_ret) const {