I've got a 2017 Jetta with 90,000 kilometers on it. After a major service, there's a plastic rattling noise coming from the AC area when driving at low speeds. What could be causing this?

I also have a 2017 Jetta. When it's cold and I start the car with the AC on, there's a plastic rattling sound. Once it warms up, it goes away. [I want some peace] I've never figured out what's going on.