On the "Create Feature" screen, the Edit Components section titled "Mobile Tools: mobile_tools_device_group", the default device group "mobile" is always missing. When the configuration for the default device group has been overridden, it should appear in the list to be exported as a Feature.

Comments

MIght be related to this warning message:

Warning: file_exists() expects parameter 1 to be string, array given in ctools_get_plugins() (line 253 of /var/www/html/drupal7/sites/library/modules/ctools/includes/plugins.inc).