jeffschuette

This might help. How do I disable responsive images in WP 4.4?

add_filter( 'max_srcset_image_width', create_function( '', 'return 1;' ) );

the problem is likely in the:

global $wp_query;

in your theme there is probably something like this:

$wp_query = new WP_Query($args);

which is conflicting with the global variable.

make sure there is no $wp_query in your theme.