Drop Full Stack Software Engineer interview questions

I applied to Massdrop via Linkedin. They very quickly responded and I had a pleasant non phone screen. I was then offered a coding challenge via email. Less than an hour after receiving that email, I receive a recruiter email from an in house talent acquisition person. Funny since I was told during the phone screen that Massdrop is very good at communication and coordination, but everyone makes mistakes so I just ignore it. Two days later I get a response to my coding challenge which were some simple follow up questions, that asked how I would test my code and how I would update my code to handle a couple of other cases. I was given a vague rejection 2 business days later.