Romain Moreau ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=5cc229d... ) *commented* on HHH-13721 ( https://hibernate.atlassian.net/browse/HHH-13721?atlOrigin=eyJpIjoiZWNjZm... ) Re: Getting duplicated entities with @OneToMany and @ElementCollection ( https://hibernate.atlassian.net/browse/HHH-13721?atlOrigin=eyJpIjoiZWNjZm... ) I updated the test case with the latest Hibernate 5 release ( 5.4.13.Final ) and this bug is still happening. I also added a hibernate-6 branch using the latest Hibernate 6 release ( 6.0.0.Alpha4 ) and the test case also fails but differently (with a StackOverflowError ). ( https://hibernate.atlassian.net/browse/HHH-13721#add-comment?atlOrigin=ey... ) Add Comment ( https://hibernate.atlassian.net/browse/HHH-13721#add-comment?atlOrigin=ey... ) Get Jira notifications on your phone! Download the Jira Cloud app for Android ( https://play.google.com/store/apps/details?id=com.atlassian.android.jira.... ) or iOS ( https://itunes.apple.com/app/apple-store/id1006972087?pt=696495&ct=Em... ) This message was sent by Atlassian Jira (v1001.0.0-SNAPSHOT#100122- sha1:38c716d )