Conflict with wp_homeurl, wp_siteurl and admin interface settings

The constants you need to define are WP_HOME, not WP_HOMEURL, and WP_SITEURL, and you need to complete address. Your addresses are missing the schemehttp://

define( 'WP_SITEURL', 'http://local.192.168.3.101.xip.io'); 
define( 'WP_HOME', 'http://local.192.168.3.101.xip.io' ); 

Without the scheme, WordPress treats those URIs like relative addresses. You can see that in the address bar if you watch what is happening.