Hello Vlad, In my first years with Hibernate 'collection mapping' seemed very important. The most 'complex' issues were applied to/with Map's etc (as with this issue). In practice, however, it is much more convenient to keep things plain and simple and handle search issues primary with queries. Therefore my current projects only work with simple lists and sometimes a set. In summary, at this moment i don't have any code to reproduce this issue. But i know the situation was just as specified in the description (the map was empty on the second call). I have to create a small project for tests like this. How do you set up/create this small projects for your examples? Do you have a template or the like? Best regards, Roland Beuker Arcus Solutions 06-33974573 * <https://nethunt.co/api/v1/track/link/click/5aeb5e401c3f279af11d3152/1543568080986/?link=http%3A%2F%2Farcus-solutions.nl%2F>* Op vr 30 nov. 2018 om 09:10 schreef Vlad Mihalcea (JIRA) < |