TLDR: They didn't respond after sending the hometask. reopened the position on LinkedIn, and stopped answering emails.
Had a call with the HR person, the conversation was really pleasing and I got interested in joining the company. After that, it was time to chat with one of the developers who works there. We didn't get into any technical questions, but we did talk about my job experience. After that, it was time to do a homework task. The test was really interesting, but it was a little confusing because it relied too much on specific industry knowledge. I sent an email with questions, but didn't get a reply. Unfortunately, after sending the solution, there was no more contact from the company, neither a positive nor a negative feedback. A few days later the position was open again on LinkedIn, and they didn't answer any follow-up email.