Keep uploaded files on validation error response

[denislorch]

In case a Powermail form with a file field throws a server sided validation error on submit (for example in the E-Mail or Captcha field), the previous appended files are lost in the response, other field values are available (as expected). Without an validation error, the files are stored and showed in the file field template.

What is the intentional behvaiour for files in this case?

On the technical side, the FormController::initializeCreateAction() is executed and stops before the FormController::createAction() => UploadedDataProcessor run.

Discovered under

TYPO3 v10.4.37 Powermail v8.4.2 PHP v7.4.11