HTML-sOrder Bestätigungsmail wird nach Update auf 5.6.2 nicht mehr verschickt

Meldung auf der Seite nach dem Bestellabschluß, Mail kommt aber an.

Fatal error : Uncaught Doctrine\ORM\ORMInvalidArgumentException: Multiple non-persisted new entities were found through the given association graph: * A new entity was found through the relationship ‚Shopware\Models\Mail\Log#type‘ that was not configured to cascade persist operations for entity: Shopware\Models\Mail\Mail@0000000032a648f60000000052d99e1c. To solve this issue: Either explicitly call EntityManager#persist() on this unknown entity or configure cascade persist this association in the mapping for example @ManyToOne(…,cascade={„persist“}). If you cannot find out which entity causes the problem implement ‚Shopware\Models\Mail\Mail#__toString()‘ to get a clue. * A new entity was found through the relationship ‚Shopware\Models\Order\Document\Document#order‘ that was not configured to cascade persist operations for entity: Shopware\Models\Order\Order@0000000032a649c40000000052d99e1c. To solve this issue: Either explicitly call EntityManager#persist() on this unknown entity or configure cascade persist this associ in  /home/repwgerd/www.shop.ch/vendor/doctrine/orm/lib/Doctrine/ORM/ORMInvalidArgumentException.php  on line  105