### 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.
}
		}
#endif 
	}
}
RID Viewport::get_viewport_rid() const {
	ERR_READ_THREAD_GUARD_V(RID());
	return viewport;
}
void Viewport::update_canvas_items() {
	ERR_MAIN_THREAD_GUARD;
	if (!is_inside_tree()) {
		return;
	}
	_update_canvas_items(this);
}
void Viewport::_set_size(const Size2i &p_size, const Size2i &p_size_2d_override, bool p_allocated) {
	Transform2D stretch_transform_new = Transform2D();
	if (is_size_2d_override_stretch_enabled() && p_size_2d_override.width > 0 && p_size_2d_override.height > 0) {
		Size2 scale = Size2(p_size) / Size2(p_size_2d_override);
		stretch_transform_new.scale(scale);
	}
	Size2i new_size = p_size.max(Size2i(2, 2));
	if (size == new_size && size_allocated == p_allocated && stretch_transform == stretch_transform_new && p_size_2d_override == size_2d_override) {
		return;
	}
	size = new_size;
	size_allocated = p_allocated;
	size_2d_override = p_size_2d_override;
	stretch_transform = stretch_transform_new;