TYPO3 Core

When using the `NewContentElementController` and its `saveAndClose` functionality, the `pi_flexform` field gets set to `null` although a flexform is defined for the specific content element. As opposed to not using the `saveAndClose` functionality and saving the content element manually which fills the `pi_flexform` field.
This is a problem due to defaults coming from this flexform field (that a template would use) not being available in the frontend template (or the processor processing the flexform). An editor has to manually reopen and save the content element to get the `pi_flexform` field correctly set.

This is the part of the code that leads to this behaviour:

                    if (($wInfo['saveAndClose'] ?? false)) {
                        $viewVariables['target'] = (string)$this->uriBuilder->buildUriFromRoute('tce_db', [
                            'data' => [
                                'tt_content' => [
                                    StringUtility::getUniqueId('NEW') => array_replace($defVals, [
                                        'colPos' => $this->colPos,
                                        'pid' => $this->uid_pid,
                                        'sys_language_uid' => $this->sys_language,
                                    ]),
                                ],
                            ],
                            'redirect' => $this->R_URI,
                        ]);
                    }