Custom fields not available in RSS output since jEvents update from 3.6.42 to 3.6.55

Since update to jEvents 3.6.55, the customized RSS feed we use to populate a database is not working. Custom fields added to the output ($row->customfields[$code]["value"]) are not available anymore. We previously used this additional code (rss.php) which was working fine:

$item->startDate = $item_startdate;
$item->endDate = $item_enddate;

$item->identifier = $row->get('extra_info');
$item->season = $row->customfields['season']['value'];
$item->state = $row->customfields['Status']['value'];

$country_3lc = str_replace('/','',$row->get('loc_country'));
$item->countryName = $country_3lc;
$item->countryCode = $country_3lc;
$item->countryFlag = JUri::base().'images/jevents/jevlocations/thumbnails/thumb_'.$row->get('loc_image');

$item->logo = $row->_imageurl1? (JUri::base().$row->_imageurl1) : '';
$item->picture = $row->_imageurl2? (JUri::base().$row->_imageurl2) : '';


$item->id = $item_slug;
$item->city = $row->get('loc_city');

$item->city = $row->get('loc_city');

$item->standardimage2 = $row->_imageurl2? (JUri::base().$row->_imageurl2) : '';;
$item->shortname = $row->get('extra_info');
$item->type = $row->customfields['type']['value'];
$item->subtype = $row->customfields['subtype']['value'];

Are the custom fields to be called differently ?