see frontend_helper.php on line 392 there is the '403 - forbidden Invalid access code' thrown

Token is empty on endpage of survey and throws 403.
Problem is not the function but token is not in _SESSION at the time of loading the function.

Hello,
For information, I encounter the same issue on the version 6.15.6+250818
Kind regards

Yes, After 6.15.5+250724 it does not work anymore... I hoped 6.15.6+250820 adresses this issue. But no!