Force usage of fit vs. override when height/width attributes are not matching

easyio-fit-override.php

<?php
/*
Plugin Name: Easy IO Fit Override
Version: 1.0.0
*/

add_filter( 'exactdn_post_image_args', 'easyio_force_fit_scale' );
function easyio_force_fit_scale( $args ) {
  if ( ! empty( $args['resize'] ) ) {
    $args['fit'] = $args['resize'];
    unset( $args['resize'] );
  }
  return $args;
}