The max_input_vars directive can be configured in .htaccess, php.ini or wp-config.php file. We recommend to increase default value to 3000. Here is how you can do it:
In .htaccess
php_value max_input_vars 3000
In php.ini
max_input_vars = 3000
In wp-config.php
@ini_set( 'max_input_vars' , 3000 );
Please do not submit multiple tickets for the same request, as this does not result in a faster response time.