Nginx server block for multiple subdomains

I have the following hostname structure:

main.domain.com is the main subdomain and is static; any other subdomain is dynamic *.domain.com

The root directory is the same for all hostnames.

Now what happens: When I access fruit.domain.com its redirecting me to main.domain.com, but it should actually stay on fruit.domain.com.

My configs:

server {
    listen 80;
    listen [::]:80;

    server_name main.domain.com *.domain.com;

    return 301 https://$server_name$request_uri;
}

server {
    listen 443 default_server ssl spdy;

    server_name main.domain.com *.domain.com;

    root /home/www/app
    ...
}