Stefan Ocke ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=557058%... ) *updated* an issue Hibernate ORM ( https://hibernate.atlassian.net/browse/HHH?atlOrigin=eyJpIjoiOTQxYmQ1Yzgz... ) / Bug ( https://hibernate.atlassian.net/browse/HHH-14063?atlOrigin=eyJpIjoiOTQxYm... ) HHH-14063 ( https://hibernate.atlassian.net/browse/HHH-14063?atlOrigin=eyJpIjoiOTQxYm... ) @Convert annotation on Embeddable nested in Embeddable in an ElementCollection does not work ( https://hibernate.atlassian.net/browse/HHH-14063?atlOrigin=eyJpIjoiOTQxYm... ) Change By: Stefan Ocke ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=557058%... ) I have re-tested  [HHH-10857] with Hibernate 5.4.15: * For “simple” Embeddables (directly used in the Entity as @Embedded), @Convert annotation works. * For Embeddables in ElementCollections, @Convert annotation also works now. So, the original issue [HHH-10857] seems to be fixed. * However, in the following situation, @Convert is still ignored: ** I have an Element Collection of an Embeddable OuterEmbeddable. **  “OuterEmbeddable“ contains another Embeddable called InnerEmeddable ** Within InnerEmeddable I use @Convert on basic fields. But it is ignored. My current workaround is to use @Convert one level higher: {code:java}@Embeddable class OuterEmbeddable{ @Convert(converter = MyConverter.class, attributeName = "theFieldToConvert") InnerEmeddable theInnerEmbeddable }{code} My testcase reveals some more details: * It works if I will create a test case asap enforce field level access on the embeddables by “@Access(AccessType. FIELD)“ * The error occurs (but only on the inner embeddable) if I do not enforce field level access. ( https://hibernate.atlassian.net/browse/HHH-14063#add-comment?atlOrigin=ey... ) Add Comment ( https://hibernate.atlassian.net/browse/HHH-14063#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#100128- sha1:85a81c0 )