### Godot version

4.1 dev2, 4.0.3

### System information

Windows 10, ryzen 5900x, radeon 6950xt (driver: 23.2.2)

### Issue description

There are two bugs:
- When I create a new node, it is created outside of the viewport. (as in first video)
- When I run the project, all the content inside the viewport dont appear. (as in second video)
I believe the second issue is related to the first.

Note: these problems are in RTL editors.

https://github.com/godotengine/godot/assets/121864036/84f0d434-0d1b-4c23-9fb0-510257e2e191


https://github.com/godotengine/godot/assets/121864036/b2bc20c7-1e2e-4d04-99e7-d66860ffced2




### Steps to reproduce

Videos explain.

### Minimal reproduction project

N/A
ERR_MAIN_THREAD_GUARD;
	data.theme_color_override[p_name] = p_color;
	_notify_theme_override_changed();
}
void Control::add_theme_constant_override(const StringName &p_name, int p_constant) {
	ERR_MAIN_THREAD_GUARD;
	data.theme_constant_override[p_name] = p_constant;
	_notify_theme_override_changed();
}
void Control::remove_theme_icon_override(const StringName &p_name) {
	ERR_MAIN_THREAD_GUARD;
	if (data.theme_icon_override.has(p_name)) {
		data.theme_icon_override[p_name]->disconnect("changed", callable_mp(this, &Control::_notify_theme_override_changed));
	}
	data.theme_icon_override.erase(p_name);
	_notify_theme_override_changed();
}
void Control::remove_theme_style_override(const StringName &p_name) {
	ERR_MAIN_THREAD_GUARD;
	if (data.theme_style_override.has(p_name)) {
		data.theme_style_override[p_name]->disconnect("changed", callable_mp(this, &Control::_notify_theme_override_changed));
	}
	data.theme_style_override.erase(p_name);
	_notify_theme_override_changed();
}
void Control::remove_theme_font_override(const StringName &p_name) {