### 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
next_child = const_cast<Control *>(this);
				while (next_child && !next_child->is_set_as_top_level()) {
					next_child = cast_to<Control>(next_child->get_parent());
				}
				if (!next_child) {
					next_child = const_cast<Control *>(this);
					while (next_child) {
						if (next_child->data.RI) {
							break;
						}
						next_child = next_child->get_parent_control();
					}
				}
			}
		}
		if (next_child == from || next_child == this) { 
			return (get_focus_mode() == FOCUS_ALL) ? next_child : nullptr;
		}
		if (next_child) {
			if (next_child->get_focus_mode() == FOCUS_ALL) {
				return next_child;
			}
			from = next_child;
		} else {
			break;
		}
	}
	return nullptr;
}
static Control *_prev_control(Control *p_from) {