### Godot version

v4.0 rc6

### System information

Windows 10

### Issue description

When using a ViewportTexture from a SubViewport on a TextureRect, it throws errors after running the scene once and then switching scenes in the editor.
![Pasted image 20230227212626](https://user-images.githubusercontent.com/44676282/221680047-984fa03e-33d1-4856-9a7f-1700b28423cf.png)


### Steps to reproduce

Run the canvas-scene once.
Switch to another scene in the editor.
Switch back to the canvas-scene

### Minimal reproduction project

[ViewportTextureError.zip](https://github.com/godotengine/godot/files/10844099/ViewportTextureError.zip)

ERR_READ_THREAD_GUARD_V(false);
	return is_audio_listener_3d_enabled;
}
void Viewport::_update_audio_listener_3d() {
	if (AudioServer::get_singleton()) {
		AudioServer::get_singleton()->notify_listener_changed();
	}
}
void Viewport::_listener_transform_3d_changed_notify() {
}
void Viewport::_audio_listener_3d_set(AudioListener3D *p_listener) {
	if (audio_listener_3d == p_listener) {
		return;
	}
	audio_listener_3d = p_listener;
	_update_audio_listener_3d();
	_listener_transform_3d_changed_notify();
}
bool Viewport::_audio_listener_3d_add(AudioListener3D *p_listener) {
	audio_listener_3d_set.insert(p_listener);
	return audio_listener_3d_set.size() == 1;
}
void Viewport::_audio_listener_3d_remove(AudioListener3D *p_listener) {