Session data not stored if receiver mail was sent and redirect enabled

[KreativeKrise]

I want to store some form data into the user session with help of the saveSession function (https://github.com/einpraegsam/powermail/blob/develop/Documentation/ForAdministrators/BestPractice/SaveSession.md). After submit I redirect the user to another page. The form data are stored in the session, until an email to the receiver will be sent.

My typoscript configuration:

plugin.tx_powermail.settings.setup.saveSession {
  _method = temporary
  e_mail = TEXT
  e_mail.field = e_mail
}

• If the receiver email is set inside plugin settings, then the session data are not stored (no fe_typo_user cookie generated).
• If the receiver email is not set inside plugin settings, then the session data are stored (fe_typo_user cookie generated).

It doesn't matter if I set the _method = temporary or _method = permanently.

Tested with powermail 8.1.2 and TYPO3 10.4.6.

[cmbeckmann]

I can confirm this problem with powermail 8.3.1 and Typo3 10.4.14.

I noticed that in a recent commit the call to storeSessionData() was removed in SessionUtility::setSessionValue(). Putting it back at the end of the function seems to solve the problem: ObjectUtility::getTyposcriptFrontendController()->fe_user->storeSessionData()

But I don't know if this has any unwanted side effects, or why the call was removed in the first place.