### 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.
ERR_READ_THREAD_GUARD_V(SHADOW_ATLAS_QUADRANT_SUBDIV_DISABLED);
	ERR_FAIL_INDEX_V(p_quadrant, 4, SHADOW_ATLAS_QUADRANT_SUBDIV_DISABLED);
	return positional_shadow_atlas_quadrant_subdiv[p_quadrant];
}
Ref<InputEvent> Viewport::_make_input_local(const Ref<InputEvent> &ev) {
	if (ev.is_null()) {
		return ev; 
	}
	Transform2D ai = get_final_transform().affine_inverse();
	return ev->xformed_by(ai);
}
Vector2 Viewport::get_mouse_position() const {
	ERR_READ_THREAD_GUARD_V(Vector2());
	if (!is_directly_attached_to_screen()) {
		
		
		return gui.last_mouse_pos;
	} else if (DisplayServer::get_singleton()->has_feature(DisplayServer::FEATURE_MOUSE)) {
		return get_screen_transform_internal(true).affine_inverse().xform(DisplayServer::get_singleton()->mouse_get_position());
	} else {
		
		return get_screen_transform_internal().affine_inverse().xform(Input::get_singleton()->get_mouse_position());
	}
}
void Viewport::warp_mouse(const Vector2 &p_position) {