You are only returning the field if you change the setting. You need to always return the field
add_filter('acf/load_field/name=employers_name', 'my_acf_load_employers_name');
function my_acf_load_employers_name( $field ) {
if( is_page('edit-profile') ) {
// make required
$field['required'] = false;
}
// return
return $field;
}