TYPO3 Core

TYPO3\CMS\Extbase\Mvc\Web\RequestBuilder::build line 143 reduces $fileParameters nesting which breaks upload handling

Expected result
$fileParameters['user']['image']⁰ = ['name'....];

Current result
$fileParameters['image']⁰ = ['name'....];

This leads to missing uploads in argument user.

Solution would be to drop the condition after $fileParameters = $this->mapUploadedFilesToParameters($files, []);