Dynamic list does not work in the tracker plugin when its reference field (normally an item link) is not shown in the form, with patch

function prepare_dynamic_items_list($field, &$fields) {
		$refFieldId = $field['options_array'][2];
        $refFieldOnTheForm = false;
		$fieldIdx = 0;
		foreach ($fields as $i=>$ff) { // get the item link field
			if ($ff['fieldId'] == $refFieldId) {
				$refFieldOnTheForm = true;
				$refFieldId = $i;
			}
			if ($ff['fieldId'] == $field['fieldId']) {
				$fieldIdx = $i;
			}
		}
		
        if (!$refFieldOnTheForm) {
            // we prentend it was an item list
			// the $fields[$fieldIdx]['list'] is to be filled in
			$fields[$fieldIdx]['type'] = 'r';
			// caller may use a $fields[$fieldIdx]['list'] = array('kutya','macska');
		}
		else { // ---- FROM HERE IT IS ALL OLD CODE
			if (!isset($fields[$refFieldId]['http_request'])) {
				$fields[$refFieldId]['http_request'] = array('', '', '', '', '', '', '', '', '');
			}
			for ($i = 0; $i < 5; $i++) {
				if (!empty($fields[$refFieldId]['http_request'][$i])) {
					$fields[$refFieldId]['http_request'][$i] .= ',';
				}
				if (!empty($field['options_array'][$i])) {
					$fields[$refFieldId]['http_request'][$i] .= $field['options_array'][$i];
				}
			}
			$fields[$refFieldId]['http_request'][5] .=
					($fields[$refFieldId]['http_request'][5] ? ",":"") .
					$field['fieldId'];
			$fields[$refFieldId]['http_request'][6] .=
					($fields[$refFieldId]['http_request'][6] ? "," : "") .
					$field['isMandatory'];
			$fields[$refFieldId]['http_request'][7] .= $fields[$refFieldId]['value'];
			$fields[$refFieldId]['http_request'][8] .= ($fields[$refFieldId]['http_request'][8] ? "," : "") . $field['value'];
		}
	}

foreach ($flds['data'] as $i=>$f) { // collect additional infos
				if (in_array($f['fieldId'], $outf)) {
...
					} elseif ($f['type'] == 'w') {
                     RIGHT HERE ->
                                        }

$trklib->prepare_dynamic_items_list($f, $flds['data']);
						if ($flds['data'][$i]['type'] == 'r') {
							// we prentended it was an item link
							$bindingItemLinkField = $trklib->get_tracker_field($f['options_array'][2]);
							$bindingValueIndex = $trklib->get_item_id($bindingItemLinkField['options_array'][0], $bindingItemLinkField['options_array'][3], $bindingValue);
							$flds['data'][$i]['list'] = $trklib->get_filtered_item_values($f['options_array'][1], $bindingValueIndex, $f['options_array'][3]);
						}