TYPO3 Core

Relation handler replaces the UID of relativized record by the UID of the original one only for the type inline and not for other types (for example select).

SYSEXT:core/Classes/Database/RelationHandler.php

..........

if ($configuration['type'] !== 'inline' || empty($configuration['foreign_table']) || !empty($configuration['foreign_field'])
    || !empty($configuration['MM']) || count($this->tableArray) !== 1 || empty($this->tableArray[$configuration['foreign_table']])
    || (int)$GLOBALS['BE_USER']->workspace === 0 || !BackendUtility::isTableWorkspaceEnabled($configuration['foreign_table'])) {
    return;
}

..........

$item['id'] = $this->getLiveDefaultId($item['table'], $item['id']);

..........

This results in display error and does not allow workspace publication for records containing relation types different to inline.