Hi, @josipamrsa. The SSL is working now. It is hard to say what caused delays without detailed information being provided about what DNS records did and did not work previously. I see numerous changes made to the DNS zone at Netlify and the domain management settings on the site in question.
It could have been a bug. It could have been time to live issues. There are many possibilities as to what the cause was but without additional information being provided I cannot say with any certainty what the cause was but it is working now.