multiple server block only 1 server block is loaded in mobile - nginx

Question

I am creating server block in sites-available nginx. I have 2 server name it works fine if access to browser but in mobile it will show the i.p address and it will load the first app, I cannot load the my second app because If I dial in url mysecondsubdomain.mydomain.com it will redirect to i.p address and the first app will be serve.. I don't know why it behaves like this
updated : I noticed also in browser after few hours when I type mysecondsubdomain.mydomain.com i will be redirected to i.p adress and it will serve my first app
server {
listen 80 default_server;
listen [::]:80 default_server;
root /var/www/banking/public/;
index index.php index.html index.htm;
server_name banking.mydomain.com;
location / {
try_files $uri $uri/ /index.php?$query_string;
}
location ~ \.php$ {
try_files $uri /index.php =404;
fastcgi_pass unix:/var/run/php/php5.6-fpm.sock;
fastcgi_index index.php;
fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
include fastcgi_params;
}
}
server {
listen 80;
listen [::]:80;
root /var/www/inventory/public/;
index index.php index.html index.htm;
server_name inventory.mydomain.com;
location / {
try_files $uri $uri/ /index.php?$query_string;
}
location ~ \.php$ {
try_files $uri /index.php =404;
fastcgi_pass unix:/var/run/php/php5.6-fpm.sock;
fastcgi_index index.php;
fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
include fastcgi_params;
}
}