### Godot version

4.0.3-stable

### System information

Windows 10

### Issue description

In some projects ViewportTexture remains pink and doesn't render viewport content after upgrading from 4.0.2-stable to 4.0.3-stable. If a pair of files viewport.h/viewport.cpp are downgraded back to what they were in 4.0.2-stable, problem goes away.

This is how it looks in 4.0.3-stable:
![4 0 3_stable_viewport_4 0 3](https://github.com/godotengine/godot/assets/1449921/44c191a9-4b67-4b02-90b6-4ab615f62a73)

And this is how it looks if viewport.h/viewport.cpp are downgraded back to what they were in 4.0.2-stable.
![4 0 3_stable_viewport_4 0 2](https://github.com/godotengine/godot/assets/1449921/f5abc605-f129-4222-9c0e-e9a07621dd9d)



### Steps to reproduce

Unfortunately, I cannot come up wit a simple demo project reproducing the problem. It exists in some projects and doesn't exist in others.


### Minimal reproduction project

Cannot produce a simple project reproducing the problem. In simple projects it works fine.
Point2 click = gui.mouse_focus->get_global_transform_with_canvas().affine_inverse().xform(gui.last_mouse_pos);
		for (int i = 0; i < 3; i++) {
			if ((int)mask & (1 << i)) {
				Ref<InputEventMouseButton> mb;
				mb.instantiate();
				
				mb->set_position(click);
				mb->set_button_index(MouseButton(i + 1));
				mb->set_pressed(false);
				mb->set_device(InputEvent::DEVICE_ID_INTERNAL);
				gui.mouse_focus->_call_gui_input(mb);
			}
		}
		gui.mouse_focus = focus_grabber;
		click = gui.mouse_focus->get_global_transform_with_canvas().affine_inverse().xform(gui.last_mouse_pos);
		for (int i = 0; i < 3; i++) {
			if ((int)mask & (1 << i)) {
				Ref<InputEventMouseButton> mb;
				mb.instantiate();
				
				mb->set_position(click);
				mb->set_button_index(MouseButton(i + 1));
				mb->set_pressed(true);
				mb->set_device(InputEvent::DEVICE_ID_INTERNAL);
				MessageQueue::get_singleton()->push_callable(callable_mp(gui.mouse_focus, &Control::_call_gui_input), mb);
			}
		}
	}
}
void Viewport::push_text_input(const String &p_text) {