Duplicate set entries with LazyHashSet.add()

[ZockiRR]

Environment Details

• Eclipse Serializer Version: 1.2.0
• JDK version: 21.0.1
• OS: Win 10
• Used frameworks: -

Describe the bug

I am using a LazyHashSet to store a Wrapper Object, which is identified by identity. When I just use LazyHashSet.add(wrapper) it happens that the same Wrapper appears multiple times in the LazyHashSet and add returns true even tho the Wrapper is already in the set. I am currently not sure when exactly it happens, it is not always. It seems to work correctly when I do a contains check before adding.

To Reproduce

Store Objects in the LazyHashSet with no overriden equals or hashCode Method. Add the same instance multiple times. The LazyHashSet is stored with eclipse-store, but currently contains only a few objects (< 30).

Expected behavior

One Object instance only appears once in the LazyHashSet.