TYPO3 Core

In an extbase controller with a new and create action, the request arguments are lost, if the validation on the create-action reports errors and redirects to the new action. If the validation is successfull the Arguments are not lost.
This behavior has changed from former Typo3 Versions (6.0) where the arguments existed after redirect/validation.

I tried to figure out where this happens, but could not resolve the problem due to lack of knowledge on the extbase core. I got down to it, that in the first loop of the dispatcher->process the request is correct and contains the arguments, in the second loop the arguments are empty.

The original request ( $this->request->getOriginalRequest() ) contains the arguments but I think the arguments should not get lost during validation/redirection.